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An IBM-built computer that has topped the list of the world’s 500 most powerful supercomputers has widened its lead in the latest ranking released Monday. The computer named Blue Gene/L, deployed at Lawrence Livermore National Laboratory, has doubled its performance to 280.6 trillion calculations per second (teraflops), up from 136.8 …

BAGHDAD – Al Qaeda (search) in Iraq claimed Thursday to have shot down a U.S. attack helicopter that crashed near Ramadi, killing two Marines aboard, and residents buried dead from what they said was a subsequent U.S. airstrike nearby. Boys stood Thursday beside the wreckage of an AH-1W Super Cobra …

Watch “Hannity & Colmes” weeknights at 9 p.m. ET! Nov. 3: Former White House aide Lewis “Scooter” Libby pleaded not guilty before a federal judge in Washington, D.C. today and waived his right to a fair trial relating to the leak of a covert CIA operative’s identity. As Libby entered …