Few historical events have received more attention or been more carefully reenacted than the assassination of President Kennedy. 

Yet as the country approaches the 48th anniversary of that tragic day in Dallas, a team of historians and retired Secret Service officers claims to have used new technology on old evidence to solidify the judgment that Lee Harvey Oswald acted alone. 

The NatGeo channel will air the new tests as part of a one-hour documentary this Sunday night called "JFK: The Lost Bullet." 

Historian Max Holland led the team that applied digital technology to a number of home movies taken on Nov. 22, 1963, including the famous Zapruder film....