The Marine Corps released the identities Wednesday night of the seven Marines who died this week when a mortar shell exploded during a live-fire training exercise at Hawthorne Army Depot in Nevada. 
 
 Those killed were Pfc. Joshua M. Martino, 19, of Clearfield, Pa.; Lance Cpl. David P. Fenn II, 20, of Polk City, Fla.; Lance Cpl. Roger W. Muchnick Jr., 23, of Fairfield, Conn.; Lance Cpl. Joshua C. Taylor, 21, of Marietta, Ohio; Lance Cpl. Mason J. Vanderwork, 21, of Hickory, N.C.; Lance Cpl. William T. Wild IV, 21, of Anne Arundel, Md.; and Cpl. Aaron J. Ripperda, 26, of Madison, Ill. 
 
 The Marines did not identify the eight injured -- seven Marines and a Navy corpsman. All the victims were members of 1st Battalion, 9th Marine Regiment, 2nd Marine Division, II Marine Expeditionary Force, based at Camp Lejeune, N.C. 
 
 In a statement, the Marines said the Navy corpsman is very seriously injured, five Marines are seriously injured, and two Marines have been treated for minor injuries and released. 
 
 In a statement, the unit’s commanding officer, Lt. Col. Andrew J. McNulty, said the 60-millimeter mortar system “failed to function as designed.’’ 
 
 McNulty praised the efforts of Marines and sailors who provided first aid immediately after the mortar round exploded Monday, calling it “nothing short of heroic.’’ 
 
 “There were numerous acts of selflessness as our injured cared for each other and directed corpsmen to care for more severely injured before being treated themselves,’’ McNulty said. 
 
 david.zucchino@latimes.com 
 
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 A mortar shell explosion Monday at an Army depot in Hawthorne, Nev., killed seven Marines and injured eight other servicemen. Here are profiles of the victims: 
 
 This undated photo provided by the U.S. Marines shows Pfc. Joshua M. Martino of Clearfield, Pa. Martino, 19, was killed with six other Marines in an explosion during a Nevada training exercise on Monday,... (Associated Press) 
 
 This undated photo provided by the U.S. Marines shows Lance Cpl. William T. Wild IV, of Anne Arundel, Md. Wild, 21, was killed with six other Marines in an explosion during a Nevada training exercise... (Associated Press) 
 
 This undated photo provided by the U.S. Marines shows Lance Cpl. Mason J. Vanderwork of Hickory, N.C. Vanderwork, 21, was killed with six other Marines in an explosion during a Nevada training exercise... (Associated Press) 
 
 This undated photo provided by the U.S. Marines shows Lance Cpl. David P. Fenn II of Polk City, Fla. Penn, 20, was killed with six other Marines in an explosion during a Nevada training exercise on Monday,... (Associated Press) 
 
 This undated photo provided by the U.S. Marines shows Lance Cpl. Roger W. Muchnick Jr. of Fairfield, Conn. Muchnick, 23, was killed with six other Marines in an explosion during a Nevada training exercise... (Associated Press) 
 
 This undated photo provided by the U.S. Marines shows Lance Cpl. Joshua C. Taylor of Marietta, Ohio. Taylor, 21, was killed with six other Marines in an explosion during a Nevada training exercise on... (Associated Press) 
 
 This undated photo provided by the U.S. Marines shows Cpl. Aaron Ripperda of Highland, Ill. Ripperda was killed with six other Marines in an explosion during a Nevada training exercise on Monday, March... (Associated Press) 
 
 AARON RIPPERDA, 26 
 
 Ripperda was a football player while he attended high school in Highland, Ill., near St. Louis. He was respectful and hardworking, according to Highland High School Assistant Principal Karen Gauen, and "definitely had the discipline for the military." 
 
 Ripperda had dreams of becoming a professional chef. His aunt, Beverly Lesicko, told the St. Louis Post-Dispatch he joined the Marines for a chance to explore the world. He was scheduled to come home in May. 
 
 JOSH TAYLOR, 21 
 
 Marine Lance Cpl. Taylor, who worked with mortars and served tours in Afghanistan and Kuwait, had dreamed being in the Corps since watching the History Channel as a boy. He joined right after graduating from a high school in Marietta, Ohio, in 2010. 
 
 Taylor's grandfather, Larry Stephens, said Taylor was engaged to be married, with a wedding planned for May. 
 
 His fiancee's father called him an exceptional person. 
 
 "You don't meet many young men like him today," Keith Malone told The Marietta Times. "He was respectful to everyone, very humble, just happy, happy all the time." 
 
 Taylor is also survived by three sisters and a brother. 
 
 ROGER MUCHNICK, 23 
 
 Muchnick, who'd been in the Marines for about three years, had served in Afghanistan and was considering returning to college after his enlistment was up. He played high school lacrosse and football in Westport, Conn., and later played lacrosse at Eastern Connecticut State University, where he studied business. 
 
 In a biography on the university's website, Muchnick said the one thing he would like to do before he died was "live," and his most embarrassing moment was getting caught lip-synching in a school talent show. 
 
 "He was at the top of his game when this happened," said his grandfather, Jerome Muchnick. "You can't imagine losing a very handsome, 23-year-old grandson who was vital and loving." 
 
 JOSH MARTINO, 19 
 
 Pfc. Martino, who hailed from Dubois, Pa., and was preparing for a deployment to Afghanistan, aspired to be a Marine since boyhood. 
 
 "Since he was probably 8 years old he wanted to be a Marine," said his mother, Karen Perry. "That's all he wanted to do." 
 
 Martino was a talkative former high school athlete and accomplished hunter who hoped to marry his fiancee later this year, Perry said. 
 
 His mother said she first heard a radio news report about the Monday accident, then three Marines arrived at her workplace to say her son was among the seven dead. 
 
 WILLIAM TAYLOR WILD IV, 21 
 
 Lance Cpl. Wild joined the Marines shortly after graduating in 2010 from Severna Park High School near Annapolis, Md. His mother, Elizabeth Wild, said he was in a weapons platoon that was scheduled to deploy in November to Afghanistan. He already had been deployed twice to Afghanistan and once to Kuwait. 
 
 Wild said her son always wanted to go into the military, like his father, who is a command chief in the Air Force Reserve at Dover Air Force Base in Delaware. 
 
 DAVID FENN II, 20 
 
 Lance Cpl. Fenn, who was from Polk City, Fla., enlisted with the Marine Corps in June 2010. He was promoted to his current rank nine months later. Fenn, who served as a mortarman, received numerous accolades including a Combat Action Ribbon and National Defense Service Medal. He was last deployed in 2011 to Afghanistan. 
 
 MASON VANDERWORK, 21 
 
 Lance Cpl. Vanderwork, who was last deployed in 2011 to serve in the war in Afghanistan, was a native of Hickory, N.C. He joined the Marines in June 2010 and was promoted to his current rank by August 2011. He received several awards including the National Defense Service Medal.
– The Marine Corps has released the names of the seven Marines accidentally killed in a live-fire exercise in Nevada on Monday, reports the Los Angeles Times. Eight people were also injured, one very seriously, although their identities have not been released. The victims were all based in Camp Lejeune, NC. A 60-millimeter mortar system "failed to function as designed," according to the unit's commanding officer, who praised first responders for actions that were "nothing short of heroic." The dead are: Pfc. Joshua M. Martino, 19, of Clearfield , Pa.; Lance Cpl. David P. Fenn II, 20, of Polk City, Fla.; Lance Cpl. Roger W. Muchnick Jr., 23, of Fairfield, Conn.; Lance Cpl. Joshua C. Taylor, 21, of Marietta, Ohio; Lance Cpl. Mason J. Vanderwork, 21, of Hickory, N.C.; Lance Cpl. William T. Wild IV, 21, of Anne Arundel, Md.; and Cpl. Aaron J. Ripperda, 26, of Madison, Ill. The AP has a profile of each of the Marines here.