Three Americans, originally from Ecuador, the Dominican Republic and India, share their insights about immigration's transformation of our country. The lively discussion at the Aspen Ideas Festival also included conservative Grover Norquist of Americans for Tax Reform. They all say immigration is our national challenge and our national strength. Cristina Jimenez of United We Dream, Alejandra Castillo of the US Dept. of Commerce, Deepak Bhargava of the Center for Community Change, and moderator Ron Brownstein.