PITTSBURGH — The father of a man killed when Flight 93 crashed in Western Pennsylvania on Sept. 11, 2001, wants his son's name withheld from a memorial to the victims because of renewed concerns that its design is rife with Islamic symbolism.

Tom Burnett Sr., of Northfield, Minn., served on a jury that picked the winning design, originally named "Crescent of Embrace," and said the request was "something I'd rather not do, but I can't get anyone to listen."

Burnett's son, Thomas E. Burnett Jr., 38, died along with 39 other passengers and crew members when Flight 93 was hijacked and crashed into a field near Shanksville while flying to San Francisco from Newark, N.J. An investigation concluded the hijackers crashed when passengers rushed the cockpit and tried to regain control of the aircraft, which is believed to have been headed for Washington, D.C.

Nearly two years ago, designer Paul Murdoch changed the memorial's planned shape to a nearly full circle in response to critics who said the original crescent shape honored the Muslim extremists who carried out the attacks.

Burnett said many of his concerns were based on the theories of a conservative blogger, Alec Rawls of Palo Alto, Calif., who has also written a book on the memorial's design.