A newly-released collection of photographs from the Marine Corps depicts the horrific aftermath of a March 18, 2013 explosion that claimed the lives of seven Camp Lejeune Marines who were conducting live-fire training in Hawthorne, Nev. A previously released command investigation, obtained by Marine Corps Times, revealed that the source of the tragic accident was a mortar tube that was unintentionally double-loaded during night training. Three Marine officers were dismissed in the wake of the tragedy. New photographs, released to Marine Corps Times this week through a Freedom of Information Act request, reveal the force of the blast and its…