There are an estimated 11 million undocumented immigrants living in the United States, and it's a number you might have heard a lot about this week from Washington lawmakers.
Since the 1970s, Jeff Passel, now senior demographer at the Pew Hispanic Center, has been keeping tabs on a group that actively tries to stay off the radar. He says many actually do participate in the census count and other surveys.
Authorities in Mexico City said Friday morning that at least 32 people had been killed and another 120 or so injured by the explosion Thursday afternoon at the headquarters of Pemex, Mexico's state-owned oil company.
In the U.S., farmers and farm workers alike say the current system to import temporary workers, especially in agriculture, is slow and fraught with abuses.
But the shape of a new guest-worker program is still being hashed out. Some say the U.S. should import temporary workers the same way Canada does. For nearly four decades, the governments of Canada and Mexico have cooperated to fill agriculture jobs that Canadian citizens won't do, and that Mexicans are clamoring to get.