"The last of the nation’s biggest nuclear bombs, a Cold War relic 600 times more powerful than the atomic bomb dropped on Hiroshima was dismantled Tuesday in what one energy official called a milestone in President Barack Obama’s mission to rid the world of nuclear weapons.
Workers in Texas separated the roughly 300 pounds of high explosives inside from the special nuclear material — uranium — known as the pit. The work was done outside of public view for security reasons, but explosives from a bomb taken apart earlier were detonated as officials and reporters watched from less than a mile away.
Deputy Secretary of Energy Daniel Poneman called the disassembly "a milestone accomplishment." The completion of the dismantling program is a year ahead of schedule, according to the U.S. Department of Energy’s National Nuclear Security Administration, and aligns with Obama’s goal of reducing the number of nuclear weapons..." (Source)