(01 of19)
Open Image ModalA child cries in front of a police barricade after migrants were blocked by Turkish riot police while walking towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on footfor the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(02 of19)
Open Image ModalMigrants and refugees face Turkish riot police officers after they were blocked while walking towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on footfor the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(03 of19)
Open Image ModalA child cries in front of a police barricade after migrants were blocked by Turkish riot police while walking towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on footfor the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(04 of19)
Open Image ModalMigrants and refugees try to push a police barricade after they were blocked by Turkish riot police while walking towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on footfor the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(05 of19)
Open Image ModalMigrants and refugees walk towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on footfor the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(06 of19)
Open Image ModalMigrants and refugees try to push a police barricade after they were blocked by Turkish riot police while walking towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on footfor the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(07 of19)
Open Image ModalA man carrying a child on his shoulders walks towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on footfor the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(08 of19)
Open Image ModalMigrants, who were blocked at a bus station, walk down a highway towards Turkeyâs western border with Greece and Bulgaria, early Monday morning, Sept. 21, 2015 in Istanbul, Turkey. Hundreds of migrants were stopped Friday by Turkish law enforcement on a highway near the city of Edirne, causing a massive traffic jam. (AP Photo/Omer Kuscu) (credit:ASSOCIATED PRESS)
(09 of19)
Open Image ModalMigrants, who were blocked at a bus station, walk down a highway towards Turkeyâs western border with Greece and Bulgaria, early morning in Istanbul, Turkey, Monday, Sept. 21, 2015. Hundreds of migrants were stopped Friday by Turkish law enforcement on a highway near the city of Edirne, causing a massive traffic jam.(AP Photo/Omer Kuscu) (credit:ASSOCIATED PRESS)
(10 of19)
Open Image ModalHundred of migrants, who were blocked at a bus station, walk down a highway towards Turkeyâs western border with Greece and Bulgaria, early Monday morning, Sept. 21, 2015, in Istanbul, Turkey. Hundreds of migrants were stopped Friday by Turkish law enforcement on a highway near the city of Edirne, causing a massive traffic jam. (AP Photo/Omer Kuscu) (credit:ASSOCIATED PRESS)
(11 of19)
Open Image ModalMigrants, who were blocked at a bus station, walk down a highway towards Turkeyâs western border with Greece and Bulgaria, early morning in Istanbul, Turkey, Monday, Sept. 21, 2015. Hundreds of migrants were stopped Friday by Turkish law enforcement on a highway near the city of Edirne, causing a massive traffic jam.(AP Photo/Omer Kuscu) (credit:ASSOCIATED PRESS)
(12 of19)
Open Image ModalHundred of migrants, who were blocked at a bus station, walk down a highway towards Turkeyâs western border with Greece and Bulgaria, early Monday morning, Sept. 21, 2015, in Istanbul, Turkey. Hundreds of migrants were stopped Friday by Turkish law enforcement on a highway near the city of Edirne, causing a massive traffic jam. (AP Photo/Omer Kuscu) (credit:ASSOCIATED PRESS)
(13 of19)
Open Image ModalMigrants and refugees try to push a police barricade after they were blocked by Turkish riot police while walking towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on footfor the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(14 of19)
Open Image ModalA migrant rests in front of a police barricade after Turkish riot police blocked the road towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on footfor the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(15 of19)
Open Image ModalA man and a child wait after Turkish riot police prevented migrants from walking towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on foot for the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(16 of19)
Open Image ModalA migrant woman with her children wait inside a bus transporting migrants back to istanbul city center after Turkish riot police prevented them to walk towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on foot for the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(17 of19)
Open Image ModalMigrants and refugees walk on a highway towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on footfor the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(18 of19)
Open Image ModalA woman carrying a child react after Turkish riot police prevented migrants from walking towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on foot for the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)
(19 of19)
Open Image ModalMigrants and refugees walk on a highway towards Edirne on September 21, 2015 in Istanbul. A new march by migrants trying to reach Europe overland from Turkey was blocked by police outside Istanbul today. Around 700 mostly Syrian men, women and children from a group that had been blocked for the past week at Istanbul's main bus station set out overnight on footfor the northwestern city of Edirne, 250 kilometres (150 miles) away. AFP PHOTO / OZAN KOSE (Photo credit should read OZAN KOSE/AFP/Getty Images) (credit:OZAN KOSE via Getty Images)