An AP photographer who captured images of Russian ambassador Andrey Karlov's assassination at an art exhibition in Ankara recalls the terrifying moment the gunman opened fire.
President Obama takes action on several issues, including the environment and Guantanamo Bay, in an effort to cement his legacy before Donald Trump takes office. CNN's Athena Jones reports.
CNN's Brian Todd reports on the latest developments in the investigation into the Berlin truck attack after authorities released the man they had in custody.
President-elect Donald Trump mocked Bill Clinton after the former president said Trump "doesn't know much" in an interview with a local paper. CNN's Jeff Zeleny reports.
Mark Wahlberg gives CNN's Jake Tapper behind-the-scenes details about directing and starring in the film "Patriots Day," which portrays the 2013 Boston Marathon bombing.
CNN's Amara Walker talks with Berlin-based journalist Matthew Karnitschnig about how Monday's attack on a Christmas market in Berlin will affect German Chancellor Angela Merkel's re-election bid.
ISIS says it inspired the truck attack at a Berlin Christmas market while authorities say they are still searching for the person responsible. CNN's Fred Pleitgen reports.
By announcing a new offshore drilling ban, President Obama seeks to secure his legacy on the environment before Donald Trump takes office. CNN's Rene Marsh reports.
