The aftermath of the Vietnam War, the war on drugs, the CIA, mental illness: These are not the ingredients one would expect from a big-budget action-comedy. But Lethal Weapon is not your typical big-budget action-comedy. The story of Martin Riggs (Mel Gibson) and Roger Murtaugh (Danny Glover) uncovering a conspiracy involving ex-special forces soldiers and L.A.'s drug trade is mostly remembered for spawning the "buddy-cop" genre and spotlighting Gibson's...