The controversial film detailing the hijacking of the fourth plane on 9/11, United 93, opens nationwide today.

The film’s Web site, http://www.u93.org, was created by Motive Entertainment, the company founded by Paul Lauer, who spearheaded marketing campaigns for The Passion of the Christ, The Polar Express, and The Chronicles of Narnia.

The controversy stems mainly from opinions that the film comes too soon, that the emotional wound from the tragic events has not yet healed. However, the families of those who were on the flight are in favor of the film.

I saw the movie on Tuesday, and agree that it's powerfully intense, not for those with weak stomachs or deep wounds from that day. I walked out speechless, reminded of how I felt that day almost five years ago. And yet, it all seemed even more real than before, seeing the events played out on a movie screen.

Acclaimed filmmaker Paul Greengrass (Bloody Sunday, The Bourne Supremacy), who directed this film, reportedly interviewed more than 100 family members and friends of those who perished. He hired flight attendants and commercial airline pilots to play those roles; hired several civilian and military controllers on duty on Sept. 11, including the FAA's Ben Sliney, to play themselves.

The film has been criticized for clunky acting, but I think this move adds a unique authenticity.

An important and effective tribute to Americans' sacrifice and bravery.