The History Channel produced a program, The 9/11 Commission Report.
The program was based on the 9/11 Commission Report with significant contributions
by the members of the commission.
In this program, the man pictured below is shown more than five times and identified
as a hijacker on board American Airlines Flight 77.

The significant discrepancy is the man above is not one of the five hijackers named in the 9/11 Commission Report as Flight 77 hijackers.
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http://www.9-11commission.gov/report/911Report_Ch1.htm9/11 Commission Report
Washington Dulles: American 77. Hundreds of miles southwest of Boston, at Dulles International Airport in the Virginia suburbs of Washington, D.C., five more men were preparing to take their early morning flight. At 7:15, a pair of them,
Khalid al Mihdhar and Majed Moqed, checked in at the American Airlines ticket counter for Flight 77, bound for Los Angeles. Within the next 20 minutes, they would be followed by
Hani Hanjour and two brothers,
Nawaf al Hazmi and Salem al Hazmi.11
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At the link below is a video first shown on NBC that shows all five of the reported
hijackers: Khalid al Mihdhar, Majed Moqed,Hani Hanjour,Nawaf al Hazmi ,and Salem al Hazmi.
http://www.msnbc.msn.com/id/5485376/ Sept. 11 panel criticizes Dulles security screeners
None of the reported hijackers in the NBC video are wearing black and
all five of the reported hijackers are identified in the NBC video.
Khalid al Mihdhar, Majed Moqed are shown wearing light colored shirts, one in long sleeves,
one in short sleeves.

Hijacker Khalid al-Mihdhar, wearing the yellow shirt, foreground, and Majed Moqed, wearing the short sleeve white shirt in the background.
Then the reported Hani Hanjour is shown,wearing a light colored long sleeve shirt.
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And then Nawaf al Hazmi and Salem al Hazmi are shown clearing security together.

Hijackers Nawaf al-Hazmi, wearing a blue shirt, and his brother, Salem al-Hazmi, in the white shirt, at the security checkpoint at Dulles International Airport in Chantilly, Va. on the morning of Sept. 11, 2001.