Morning Buzz: March 14, 2007

This morning's top stories:

• It's been a bad day for stock markets in Asia and Europe, which showed renewed fatigue this morning.
• Furor is brewing over the case of the fired U.S. attorneys despite Attorney General Alberto Gonzales's admitting that mistakes were made, U.S. News's Chitra Ragavan reports.
• President Bush wraps up his Latin America trip today after another meeting with the Mexican president. While in Mexico, he has repeatedly called for U.S. immigration reform.
• The Army Corps of Engineers installed faulty pumps in New Orleans last year in its rush to finish building new protections for the city, the AP reports.
• A Greenpeace-funded study has found that rats that were fed a certain strain of genetically modified corn for 90 days developed toxicity in their livers and kidneys.