security precautions

Tighter Security At Some US Missions Over al-QaidaSecurity forces closed roads, put up extra blast walls and increased patrols Sunday near some of the more than 20 U.S. diplomatic missions in the Muslim world that Washington had ordered closed for the weekend following warnings of a possible al-Qaida attack.
Boston Marathon Blasts Put World's Cities On Alert The deadly explosions at the Boston Marathon reverberated on both sides of the Atlantic as cities from Los Angeles to London saw a surge in security.
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