Pablo Blanco, right, stands next to the memorial site for victims of the March 25, 1990, Happy Land social club fire, during an interview, Tuesday, March 24, 2015, in the Bronx borough of New York. Blanco, whose favorite uncle was among the 87 victims of an arsonist, will join a memorial Mass and vigil at the site to mark the 25th anniversary of what was then the biggest mass murder in modern U.S. history. (AP Photo/Bebeto Matthews)