Monica Ortiz Uribe

Doctors estimate there are about 250 severe scorpion stings a year in America, but the U.S. ran out of its own supply of scorpion antivenom nearly a decade ago. Mexican doctors, however, have been treating stings from venomous creatures for years, and what they've learned may now save American lives.

Mexican and U.S. leaders have vowed to track down the gunmen who killed three people, including two U.S. citizens, with ties to the U.S. Consulate in the border town of Juarez. Mexican authorities say they believe the killings are linked to the country's raging drug war.