Thailand Explosion(01 of22)
Open Image ModalThai family members pray by the coffin of a victim of the Erawan Shrine bombing at a hospital in Bangkok, Thailand, Tuesday, Aug. 18, 2015. Thailand's prime minister promised to track down those responsible for the central Bangkok bombing which he described as the country's worst attack in history.(AP Photo/Sakchai Lalit) (credit:Sakchai Lalit/AP)
Thailand Explosion(02 of22)
Open Image ModalThai family members gather around the coffin of a victim of the Erawan Shrine bombing at a hospital in Bangkok, Thailand, Tuesday, Aug. 18, 2015. Thailand's prime minister promised to track down those responsible for the central Bangkok bombing which he described as the country's worst attack in history.(AP Photo/Sakchai Lalit) (credit:Sakchai Lalit/AP)
Attack on Bangkok shrine(03 of22)
Open Image ModalBANGKOK, THAILAND - AUGUST 18: Damaged roads outside Erawan Shrine after a bomb exploded outside a religious shrine in central Bangkok, Thailand on August 18, 2015. The death toll rise to more then 21 with 123 injured from the deadly blast in Central Bangkok last night, (included seven tourists from China, Singapore, Malaysia and Hong Kong). The bomb exploded around 7.00PM, during the rush hour, front of the famous Erawan Shrine, and surrounded by luxury Bangkok shopping mall. (Photo by Guillaume Payen/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Attack on Bangkok shrine(04 of22)
Open Image ModalBANGKOK, THAILAND - AUGUST 18: Damaged roads outside Erawan Shrine after a bomb exploded outside a religious shrine in central Bangkok, Thailand on August 18, 2015. The death toll rise to more then 21 with 123 injured from the deadly blast in Central Bangkok last night, (included seven tourists from China, Singapore, Malaysia and Hong Kong). The bomb exploded around 7.00PM, during the rush hour, front of the famous Erawan Shrine, and surrounded by luxury Bangkok shopping mall. (Photo by Guillaume Payen/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Attack on Bangkok shrine(05 of22)
Open Image ModalBANGKOK, THAILAND - AUGUST 18: Damaged roads outside Erawan Shrine after a bomb exploded outside a religious shrine in central Bangkok, Thailand on August 18, 2015. The death toll rise to more then 21 with 123 injured from the deadly blast in Central Bangkok last night, (included seven tourists from China, Singapore, Malaysia and Hong Kong). The bomb exploded around 7.00PM, during the rush hour, front of the famous Erawan Shrine, and surrounded by luxury Bangkok shopping mall. (Photo by Guillaume Payen/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
THAILAND-UNREST-BOMBING(06 of22)
Open Image ModalRelatives of a Chinese tourist killed in a bomb blast outside a religious shrine grieve after identifying the body at the Institute of Forensic Medicine in Bangkok on August 18, 2015. The death toll from a bomb blast in the Thai capital rose to 20 on August 18 with 123 wounded, police said, with eight tourists from China, Hong Kong, Indonesia, Malaysia and Singapore among those killed in the attack. AFP PHOTO / PORNCHAI KITTIWONGSAKUL (Photo credit should read PORNCHAI KITTIWONGSAKUL/AFP/Getty Images) (credit:PORNCHAI KITTIWONGSAKUL via Getty Images)
THAILAND-UNREST-BOMBING(07 of22)
Open Image ModalRelatives of a Chinese tourist killed in a bomb blast outside a religious shrine grieve after identifying the body at the Institute of Forensic Medicine in Bangkok on August 18, 2015. The death toll from a bomb blast in the Thai capital rose to 20 on August 18 with 123 wounded, police said, with eight tourists from China, Hong Kong, Indonesia, Malaysia and Singapore among those killed in the attack. AFP PHOTO / PORNCHAI KITTIWONGSAKUL (Photo credit should read PORNCHAI KITTIWONGSAKUL/AFP/Getty Images) (credit:PORNCHAI KITTIWONGSAKUL via Getty Images)
Thailand Explosion(08 of22)
Open Image ModalA woman walks on a sidewalk covered with broken glass near the Erawan Shrine at Rajprasong intersection in Bangkok, Thailand, Tuesday, Aug. 18, 2015, the morning after an explosion. Police combed through shattered glass and other debris Tuesday from a bomb blast in central Bangkok, trying to determine who set off the most devastating single attack in the capital's recent history. (AP Photo/Sakchai Lalit) (credit:ASSOCIATED PRESS)
THAILAND-UNREST-BOMBING(09 of22)
Open Image ModalRelatives of a Thai man killed in a bomb blast outside a religious shrine grieve after identifying the body at the Institute of Forensic Medicine in Bangkok on August 18, 2015. The death toll from a bomb blast in the Thai capital rose to 20 on August 18 with 123 wounded, police said, with eight tourists from China, Hong Kong, Indonesia, Malaysia and Singapore among those killed in the attack. AFP PHOTO / PORNCHAI KITTIWONGSAKUL (Photo credit should read PORNCHAI KITTIWONGSAKUL/AFP/Getty Images) (credit:PORNCHAI KITTIWONGSAKUL via Getty Images)
THAILAND-UNREST-BOMBING(10 of22)
Open Image ModalRelatives of a Thai man killed in a bomb blast outside a religious shrine grieve after identifying the body at the Institute of Forensic Medicine in Bangkok on August 18, 2015. The death toll from a bomb blast in the Thai capital rose to 20 on August 18 with 123 wounded, police said, with eight tourists from China, Hong Kong, Indonesia, Malaysia and Singapore among those killed in the attack. AFP PHOTO / PORNCHAI KITTIWONGSAKUL (Photo credit should read PORNCHAI KITTIWONGSAKUL/AFP/Getty Images) (credit:PORNCHAI KITTIWONGSAKUL via Getty Images)
Thailand Explosion(11 of22)
Open Image ModalPolice examine debris in front of the Erawan Shrine at Rajprasong intersection in Bangkok, Thailand, Tuesday, Aug. 18, 2015, as investigations continue the morning after an explosion. Police combed through shattered glass and other debris Tuesday from a bomb blast in central Bangkok, trying to determine who set off the most devastating single attack in the capital's recent history. (AP Photo/Sakchai Lalit) (credit:ASSOCIATED PRESS)
Thailand Explosion(12 of22)
Open Image ModalPolice examine debris in front of the Erawan Shrine at Rajprasong intersection in Bangkok, Thailand, Tuesday, Aug. 18, 2015, as investigations continue the morning after an explosion. Police combed through shattered glass and other debris Tuesday from a bomb blast in central Bangkok, trying to determine who set off the most devastating single attack in the capital's recent history. (AP Photo/Sakchai Lalit) (credit:ASSOCIATED PRESS)
Thailand Explosion(13 of22)
Open Image ModalWorkers sweep broken glass near the Erawan Shrine at Rajprasong intersection in Bangkok, Thailand, Tuesday, Aug. 18, 2015, the morning after an explosion. Police combed through shattered glass and other debris Tuesday from a bomb blast in central Bangkok, trying to determine who set off the most devastating single attack in the capital's recent history. (AP Photo/Sakchai Lalit) (credit:ASSOCIATED PRESS)
Thailand Explosion(14 of22)
Open Image ModalPolice use a magnetic tool as they examine debris in front of the Erawan Shrine at Rajprasong intersection in Bangkok, Thailand, Tuesday, Aug. 18, 2015, as investigations continue the morning after an explosion. Police combed through shattered glass and other debris Tuesday from a bomb blast in central Bangkok, trying to determine who set off the most devastating single attack in the capital's recent history. (AP Photo/Sakchai Lalit) (credit:ASSOCIATED PRESS)
Thailand Explosion(15 of22)
Open Image ModalPolice and soldiers wash the street in front of the Erawan Shrine at Rajprasong intersection the day after an explosion in Bangkok, Thailand, Tuesday, Aug. 18, 2015. Thailand's prime minister on Tuesday promised that authorities would quickly track down those responsible for the central Bangkok bombing which he described as the country's worst attack ever. (AP Photo/Sakchai Lalit) (credit:ASSOCIATED PRESS)
Thailand Explosion(16 of22)
Open Image ModalPolice and officials work near the statue of Phra Phrom, the Thai interpretation of the Hindu god Brahma, at the Erawan Shrine at Rajprasong intersection the day after an explosion in Bangkok, Thailand, Tuesday, Aug. 18, 2015. Thailand's prime minister on Tuesday promised that authorities would quickly track down those responsible for the central Bangkok bombing which he described as the country's worst attack ever. (AP Photo/Sakchai Lalit) (credit:ASSOCIATED PRESS)
Thailand Explosion(17 of22)
Open Image ModalThai family members gather around the coffin of a victim of the Erawan Shrine bombing at a hospital in Bangkok, Thailand, Tuesday, Aug. 18, 2015. Thailand's prime minister promised to track down those responsible for the central Bangkok bombing which he described as the country's worst attack in history.(AP Photo/Sakchai Lalit) (credit:ASSOCIATED PRESS)
Thailand Explosion(18 of22)
Open Image ModalThai family members pray by the coffin of a victim of the Erawan Shrine bombing at a hospital in Bangkok, Thailand, Tuesday, Aug. 18, 2015. Thailand's prime minister promised to track down those responsible for the central Bangkok bombing which he described as the country's worst attack in history.(AP Photo/Sakchai Lalit) (credit:ASSOCIATED PRESS)
Thailand Explosion(19 of22)
Open Image ModalPeople give blood at the Thai Red Cross in Bangkok, Thailand, Tuesday, Aug. 18, 2015, the day after the Erawan Shrine bombing. Thailand's prime minister promised to track down those responsible for the central Bangkok bombing which he described as the country's worst attack in history.(AP Photo/Sakchai Lalit) (credit:ASSOCIATED PRESS)
Thailand Explosion(20 of22)
Open Image ModalThai family members gather around the coffin of a victim of the Erawan Shrine bombing at a hospital in Bangkok, Thailand, Tuesday, Aug. 18, 2015. Thailand's prime minister promised to track down those responsible for the central Bangkok bombing which he described as the country's worst attack in history.(AP Photo/Sakchai Lalit) (credit:ASSOCIATED PRESS)
Thailand Explosion(21 of22)
Open Image ModalPolice investigators work near the statue of Phra Phrom, which is the Thai interpretation of the Hindu god Brahma, at the Erawan Shrine the morning after an explosion in Bangkok, Thailand, Tuesday, Aug. 18, 2015. A bomb exploded Monday within a central Bangkok shrine that is among the city's most popular tourist spots, killing a number of people and injuring others, police said. (AP Photo/Mark Baker) (credit:ASSOCIATED PRESS)
Thailand Explosion(22 of22)
Open Image ModalInvestigations continue at the Erawan Shrine the morning after an explosion in Bangkok, Thailand, Tuesday, Aug. 18, 2015. Thailand's prime minister on Tuesday promised that authorities would quickly track down those responsible for the central Bangkok bombing, which he described as the country's worst attack ever. (AP Photo/Mark Baker) (credit:ASSOCIATED PRESS)