Mr Obama's rhetoric over US torture is one of condemning the actions and adjuring us to "leave" them "where they belong - in the past". As if that answers to the seriousness of what took place. Few people would be content with a political arrangement which went no further than the condemning-and-leaving tactic if we were considering the everyday crimes of theft, fraud, assault or rape. I don't see why an official US programme of organised kidnap, illegal imprisonment and serial assault should be any different.
In October 2009, I set out on a rugby tour to France with thirty teenage boys. I had uncovered the sad story at our London club, Rosslyn Park, of a lost Great War memorial; a 1919 press clipping stated 72 had died, but no names. Some 109 names of men who lived, loved, played, fought and fell have now emerged from club records and lost memory.
For decades, Mercy Corps has worked with refugee and displaced populations, we know that building walls does not work. Europe's Schengen Agreement must remain in place and we must avoid the simplistic pretence that fences can be placed at our borders to preserve our economic well-being and security.
I've come to realise that Afghanistan has forever changed me. It has ruined me, destroyed part of me. It has left an intangible impression upon me. At the same time, it has made me, matured me, grown me, expanded my potential as a human being, taught me the importance of life, love and the little things.
The hard-won battle to eradicate polio once and for all is within our grasp but we can't relax yet. We must, maintain and accelerate our efforts. So it is heartening to see Commonwealth countries, including the UK, coming together this weekend at the Commonwealth Heads of Government meeting in Malta to review the results achieved to date and call for renewed global support.
I've been thinking all day about how I can find the words for what we experienced last week. An hours drive from my house, then half an hour on the Eurotunnel, and we were in the world's worst refugee camp in terms of resources and conditions, yet we were welcomed with open arms. It's amazing how only the people who have nothing really know how to share.