Question: What was the destination of the United Airlines flight hijacked by Ahmed al-Haznawi and three others on September 11?
Sentence (from "Flight 93 National Memorial"): The Flight 93 National Memorial is located at the site of the crash of United Airlines Flight 93, which was hijacked in the September 11 attacks, in Stonycreek Township, Somerset County, Pennsylvania, about 2 mi north of Shanksville, and 60 mi southeast of Pittsburgh.
Relevant evidence: No