3 Israeli hostages killed by mistake. Nikki Haley changes tone during Iowa town hall as race for 2nd heats up. Giuliani ordered to pay $148 mln to Georgia election workers in defamation trial. Cause of Matthew Perry's death revealed. Southwest Airlines fined $140m for holiday meltdown. Chad's comedy Christmas movie countdown. Senate staffer loses job after allegedly having sex in hearing room. Colorado paramedics found guilty in Elijah McClain’s death.