Nuclear Secrets: How America Helped Pakistan Get the Bomb (VIDEO)

Amongst the many pieces of evidence that come together to paint this picture of American involvement in helping to protect and even foster Khan's proliferation network is the extraordinary story of former CIA analyst Richard Barlow, who, as a specialist in counter-proliferation in the 1980s, had a chance to discover and expose the shocking truth: that elements in the highest levels of the intelligence community, the state department, and even the White House knew about Pakistan's procurement activities but actively turned a blind eye to them.