The exchange between Ned Walker and Lee Hamilton discusses the difficulty in defining terrorism. Walker initially states that the State Department defines terrorism as politically motivated attacks on non-combatant targets. However, Hamilton questions whether attacks on military units would be considered terrorism, to which Walker says no. After further discussion, Walker acknowledges attacks can be terrorism depending on the circumstances, even if the target is military. They agree any attack on non-combatants, including military personnel, could be considered terrorism. Ultimately, Walker says it is not productive to define all the terms under which the PLO's acts would be labeled terrorism.