Terrorism, Homeland Security | featured news

A suspicious package discovered at the United Kingdom's East Midlands airport contained "viable explosives," and could have brought down an aircraft upon detonation, British Home Secretary Theresa May said Saturday.

Major transit agencies beefed up security as a precaution Monday following the suicide bombing in Moscow's subway system.

Britain raised its international terrorism threat level to 'severe' -- its second highest level of terror alert -- from 'substantial' on Friday, Home Secretary (interior minister) Alan Johnson said.

The United States does not want countries to use identical airport security systems which could make it easier for potential attackers to elude them, U.S. Homeland Security Secretary Janet Napolitano said on Friday.

The Department of Homeland Security is further increasing aviation security in response to intelligence indicating Islamist terrorists were planning another attack, a senior U.S. official tells NBC News.