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.
Originally published on Thu January 31, 2013 8:07 pm
Credit Guillermo Gutierrez / AP
What appears to be a significant explosion has rocked the Pemex tower in Mexico City. Television images are showing smoke billowing from the glass high rise in the Mexican capital.
Pemex, the state-owned oil company, tweeted that an explosion happened in a building that is part of the oil giant's headquarters. According to the company and the country's interior minister, 14 people are dead and 80 are injured.