Pakistan has a "growing nuclear-arms program"

"Additional evidence has emerged that Pakistan is ''greatly expanding'' its nuclear weapons program even as Islamic insurgents have been advancing toward the country's heartland from its border with Afghanistan."

http://www.miamiherald.com/news/world/story/1058382.html

In other words, some of the financial aid that we give Pakistan is going into the manufacture of nuclear weapons which could fall into the hands of al Qaida, if and / or when Pakistan's government falls. Another bad policy decision.