Excerpt:
Thursday's opening of the National September 11 Memorial Museum in New York was 13 years in the making.
Museum officials consulted hundreds of people -- survivors, relatives of the victims, rescue workers, community leaders and others -- as they determined what should be included in the exhibits occupying the halls beneath the footprints of the Twin Towers.
While that effort has been applauded by many for being a fitting, emotional telling of one of the darkest days in U.S. history, it is not without its controversies. Among them is a seven-minute film entitled "The Rise of Al Qaeda."