Here is a Fox story about the latest threats.
Counterterrorism and law enforcement officials told Fox News Tuesday that they are extremely concerned that terrorist groups like Al Qaeda may be planning an attack during one of the major events scheduled for this summer.
The comments came after a think tank study revealed that despite the elimination of several key figures, Al Qaeda still has a functioning leadership, over 18,000 potential terrorists in its global network and a swelling membership thanks to the war in Iraq.