President Obama extends a hand to his Mexican counterpart, Felipe Calderon, at their joint news conference Thursday at the White House. Their remarks touched on issues of immigration, drug violence and fallout over the recent slaying of a U.S. customs agent in Mexico. (Associated Press)

President Obama extends a hand to his Mexican counterpart, Felipe Calderon, at their joint news conference Thursday at the White House. Their remarks touched on issues of immigration, drug violence and fallout over the recent slaying of a U.S. customs agent in Mexico. (Associated Press)