John F. Kennedy assassination rifle HSCA tests proved conclusively that the claim was not accurate. In 1972 the Kennedy family chose John K. Lattimer, MD as the first nongovernmental expert to examine evidence taken at Kennedy's autopsy. Lattimer performed ballistic tests and other research to prove that Lee Harvey Oswald was likely the sniper who shot and killed President John F. Kennedy from the Texas School Book Depository in Dallas. Dr. Lattimer frequently performed a demonstration of Oswald's shooting, firing three well-aimed shots within 8.3 seconds with Carcano M91/38 and under the same firing conditions. By doing so Dr. Lattimer intended to prove that Oswald
USS John F. Kennedy (CVN-79) at Northrop Grumman in Newport News, signalling the formal start of construction for "John F. Kennedy". "John F. Kennedy" was originally planned to be completed in 2018. This was extended to 2020 after Secretary of Defense Robert Gates announced in 2009 that the program would shift to a five-year building program so as to place it on a "more fiscally sustainable path". By late 2012, delays had occurred in construction, and the Navy Department was investigating extending the construction time of both the and "John F. Kennedy" by an additional two years which could delay the carrier's entry into service