All nine flight attendants had keys to the cockpit, but it’s not clear how the hijackers gained entry—Atta and his crew might have attacked Karen and Bobbi to steal their keys, or the hijackers might have gotten into the cockpit another way. When the plane dipped and pitched erratically, Betty suspected that a hijacker was already in control. She said she thought they had “jammed the way up there.” In fact, the cockpit doors were relatively flimsy and weren’t strong enough to prevent forced entry. Another possibility was that the hijackers stabbed the first-class flight attendants to induce
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