Four " muscle " hijackers were trained to storm the cockpit and overpower the crew , and three accompanied Jarrah on Flight 93 . The first , Ahmed al-Nami , arrived in Miami , Florida , on May 28 , 2001 , on a six-month tourist visa with United Airlines Flight 175 hijackers Hamza al-Ghamdi and Mohand al-Shehri . The second Flight 93 hijacker , Ahmed al-Haznawi , arrived in Miami on June 8 with Flight 11 hijacker Wail al-Shehri . The third Flight 93 muscle hijacker , Saeed al-Ghamdi , arrived in Orlando , Florida , on June 27 with Flight 175 hijacker Fayez Banihammad
United Airlines Flight 175
United Airlines Flight 175
United Airlines Flight 93