U.S. government officials, computer hackers and representatives from law enforcement and the communications industry converged in July on Las Vegas, Nevada, aiming to exchange ideas on how to make wireless communication more secure.

The publisher of online newspaper World Net Daily alleged in an Aug. 2 interview with daily political magazine FrontPageMagazine.com that al Qaeda has nuclear weapons within the United States and is preparing to unleash an "American Hiroshima."

A pamphlet published on the CIA's Web site says al Qaeda documents captured in Afghanistan indicate that the network possesses crude procedures for producing VX nerve agent, sarin and mustard gas.

Philippine officials have warned commercial airline companies that suicide bombers might be seeking to hijack airplanes or bomb them during flight. The Aug. 3 move is the latest in a string of incidents and warnings from around the world that point to the potential for terrorist attacks involving airplanes.