The intended target of United Flight 93 was most likely the United States Capitol Building in Washington, D.C. According to investigations and testimony from principal instigators of the 9/11 attacks, such as Khalid Sheikh Mohammed and Ramzi bin al-Shibh, the hijackers planned to crash the plane into a federal government building, with a high probability that the target was the Capitol. Other evidence and reports indicate that the White House was considered a possible target but was deemed more difficult to hit, making the Capitol the primary intended target for Flight 93. The passengers' revolt prevented the hijackers from reaching this target, causing the plane to crash in Pennsylvania instead, with no casualties on the ground.