This podcast was recorded at the Refugee Studies Centre's Astor Lecture which was on Thursday 5th March 2009 at Rewley House, University of Oxford. This podcast was recorded at the Refugee Studies Centre's Astor Lecture which was on Thursday 5th March 2009 at Rewley House, University of Oxford. Professor Audrey Singer, Senior Fellow, Brookings Institution gave the lecture on the subject of Obama's policy challenges and the future of US immigration.