Art helped us process 9/11 in so many ways right after the attacks. But for me the breakthrough wouldn’t come for nearly five years, at a midtown Manhattan movie theater. The Tribeca Film Festival had decided in 2006 to open with a premiere of Paul Greengrass’ United 93, despite puzzling murmurs of “too soon.” (Is there a reverse statute of limitations for when artists can make sense of trauma?) Tribeca organizers — Robert De Niro, producing partner Jane Rosenthal and the rest of the staff of the healing-minded Manhattan film gathering — invited not only Greengrass and the many terrific workaday actors featured in the film but the family…
