"We are the only country that has the capacity to take in people and 'make them American,'" says Andrew Kohut, president of the Pew Research Center. But who decides who gets to be an American? Bill Richardson, the former governor of New Mexico, and Kevin Ryan, internet entrepreneur, believe that the United States' restrictive immigration policy is getting in the way of business' ability to hire skilled technology workers and hampering innovation. Economist Daniel Altman argues that brain drain can undermine political stability and global economic growth. And immigration expert Lenni Benson re-examines the question of whether Americans ever welcomed foreigners with open arms in the first place.