US's most powerful nuclear bomb being dismantled

The last of the United States' most powerful nuclear bombs - a weapon hundreds of times stronger than the bomb dropped on Hiroshima - is being disassembled nearly half a century after it was put into service at the height of the Cold War.

The final components of the B53 bomb will be broken down Tuesday at the Pantex Plant near Amarillo, Texas, the nation's only nuclear weapons assembly and disassembly facility. (AP)