Investigators work to learn more about LAX gunman Paul Ciancia
Investigators are still piecing together just how a man armed with a semi-automatic rifle made his way into Los Angeles International Airport's Terminal #3 and opened fire, killing a TSA agent and wounding three others.
Alleged gunman Paul Anthony Ciancia is still hospitalized.
He was shot by police shortly after gunning down TSA Agent Gerardo Hernandez and wounding three other people.
Authorities say Ciancia was carrying a handwritten anti-government "manifesto".