Reply #10: May I quote from the 9/11 Commission Report?

[megatherium]

The three Hamburg pilots--Atta, Shehhi, and Jarrah--took the first of their cross-country surveillance flights early in the summer. Shehhi flew from New York to Las Vegas via San Francisco in late May. Jarrah flew from Baltimore to Las Vegas via Los Angeles in early June. Atta flew from Boston to Las Vegas via San Francisco at the end of June. Each traveled in first class, on United Airlines. For the east-west transcontinental leg, each operative flew on the same type of aircraft he would pilot on September 11 (Atta and Shehhi, a Boeing 767; Jarrah, a Boeing 757). Hanjour and Hamzi, as noted below, took similar cross-country surveillance flights in August. (page 242)

Binalshibh claims that during their time in Spain, he and Atta also discussed how the hijackings would be executed. Attah said he, Shehhi, and Jarrah had encountered no problems carrying box cutters on cross-country surveillance flights. (page 245)