Defending the U.S. from North Korea's nuclear threat; Qatar's emir stands defiant in face of blockade; then, how a WWII-era forger saved lives, one fake document at a time.

Three former U.S. soldiers dispute the official report that blames human error for a friendly-fire accident that killed six others during a secret mission in Afghanistan; three-time Olympic gold medal winning gymnast Aly Raisman.