southeastern New Mexico. Barrio Azteca also remains active, though its power has declined as hostilities against Sinaloa diminished.

Correction: The original version of this story misspelled the name of a victim of the March 13, 2010, assassinations in Juarez. His name was Arthur Redelfs. The Observer regrets the error.The two attacks by drone aircraft took place in South Waziristan, a Mehsud stronghold close to the Afghan border where Pakistani troops are gearing up for a military offensive, two officials said on condition of anonymity because they were not authorized to speak to the media.They took place as U.S. Homeland Security Secretary Janet Napolitano met government officials in the Pakistani capital, Islamabad. She discussed topics of "mutual interest" with them, a U.S. Embassy spokesman said.The drone attacks were the latest in a string of more than 40 believed to have been be carried out by the United States against militant targets in the border area since last August. Washington does not directly acknowledge being responsible for the attacks, which kill civilians as well as militants.Most Pakistanis criticize