This taken from foxnews.com
A Venice, Fla., man said FBI agents told him that two men who stayed in his home in July 2000 while training at a local flight school were the hijackers. Charlie Voss said the agents identified the men as Mohamed Atta and one known as Marwan.
FBI agents "informed me that there were two individuals that were students at Huffman Aviation, my employer, and FBI told me they were involved in yesterday's tragedy," Voss said.
Voss said he accepted the two men as house guests as a favor to the company.