One result of this , in anti-personnel weaponry , was a move away from weapons such as the M33 cluster bomb to the lethal E61 anthrax bomb .
Around October 1953 the United States Air Force reoriented its biological warfare program .
One result of in anti-personnel weaponry , was a move away from weapons such as the M33 cluster bomb to the lethal E61 anthrax bomb .
Around October 1953 the United States Air Force reoriented its biological warfare program .