SNAP DECISIONS: Christian Frei’s Oscar-nominated documentary “War Photographer,” a stunning portrait of renowned photojournalist James Nachtwey as he visits the world’s trouble spots, unreels tonight at 8:20 as part of the Swissam Film Festival at Anthology Film Archives (Second Avenue and Second Street). The fest, running through Sunday, presents 80 films of all types from Swiss and American filmmakers, plus several panel discussions. Details: http://www.swisscinema.org.