http://www.sumeria.net/politics/bushknew/ghostriders.html

"One of the best things I've read about 9/11. The author, a software engineer, thoroughly analyzes the possiblity of remote hijacking, notes that only one of the 8 black boxes involved in 9/11 has been recovered, though they are designed to withstand forces over 14 times as strong as encountered during the crashes, and temps higher than achieved during the ensuing fires for much longer time periods than those fires lasted. Video of celebrating Palestinians shows shadows inconsistent with the attack times. Concludes amongst other things that al Qaida may be a front for US and/or Israeli intelligence services."