Heroism, at least in the movies, is an easily quantifiable attribute, generally accompanied by swelling music and a self-effacing wisecrack or two. The real deal, however, proves to be a much less enviable trait. The Sundance award-winning Last Men in Aleppo is a staggering documentary about a group of scared, harried people fated to do one damned dangerous thing after another. While not easy viewing by any means, this film provides an unforgettable look at people forced into their best, defined by constant moments of terrible clarity. by Andrew Wright