Dignitaries and punk rockers rubbed elbows Wednesday night, packing the AFI Theatre and Cultural Center in Silver Spring for the D.C. premiere of a documentary on landmines by local filmmakers Mary Wareham and Brian Liu. With a soundtrack by Fugazi’s Brendan Canty and an art rock aesthetic, Wareham and Liu gave a complex and often alarming look at the global movement to end the use of landmines that was both informative and visually stunning.