Sandia National Laboratories is working on a bacteria-killing agent to clean contaminated offices.

CNN: Ten things you need to know about anthrax

In 2009, American troops opened fire at a Baghdad airport checkpoint, killing Italian secret service agent Nicola Calipari and wounding a just-freed Italian hostage, journalist Giuliana Sgrena, whom Calipari was trying to spirit out of the country.

CNN: Italians ask: Can Americans get away with murder?

Mexican police say they have arrested a suspect in the killing of a US border agent in Arizona in 2010.

BBC: Mexican arrested over US agent 'Fast and Furious' murder

Dr. Chari recalls hunting for a molecule with "1, 000-fold more killing power" than the typical cancer agent.

WSJ: Drug Conjugates: 'Guided Missiles' to Treat Cancer

The program lost track of more than 1, 000 firearms, two of which turned up in the 2010 killing of U.S. Border Patrol agent Brian Terry.

CNN: Oversight committee files contempt case against Holder

However, Fast and Furious lost track of more than 1, 000 firearms it was tracking in the operation, and two of the lost weapons turned up at the scene of the 2010 killing of U.S. Border Patrol agent Brian Terry.

CNN: Boehner: Contempt vote on Holder will proceed

The FBI opened an investigation into the incident after the killing -- standard procedure in any shooting that involves an agent.

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Moscow (CNN) -- The father of a 27-year-old man shot dead by an FBI agent said Thursday that accounts he has heard about the killing make no sense.

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