On Friday evening, a small group of heavily armed men stormed the Crocus City Hall mall and entertainment complex and began gunning people down before setting fire to the theater where over 6,000 concertgoers had gathered for a sold-out rock show. As smoke began to fill the air, dozens of victims rushing for the exits discovered a horrible truth: as with many emergencies in Russia, several life-saving doors were closed and stairwells led not to freedom but dead ends. By the time rescuers finally arrived, they found bodies clustered in the bathrooms and the stairwells, where they had been frantically, hopelessly calling for help. As of Tuesday morning, at least 139 people were dead, with an unknown number unaccounted for among the ruins.