Federal prosecutors have filed charge against suspected killer Esteban Santiago in the Florida airport shooting that left five people dead. The 26-year-old was charged with an act of violence at an airport, which could result in the death penalty if he is convicted. The FBI stated that Santiago traveled to the airport with the intent to carry out the gruesome attack. It remains unclear why Santiago chose the airport as his target, and authorities have not yet ruled out terrorism. The gunman had a history of mental health problems, some of which followed his military service in Iraq.