economy? and more importantly for you. welcome back to "early start." i'm christine romans. john berman has the week off. it is christmas eve. 30 minutes past the hour. breaking overnight, police in berkeley, missouri, near ferguson said one of the department's police officers shot and killed a man at a gas station after the man aimed a handgun at the officer. this was just after 11:00 p.m. central time. the st. louis post dispatch reports the victim is 18-year-old antonio martin identified by his mother toni martin. berkeley police say st. louis detectives are investigating. we're going to bring you the details as we get them. fierce weather ushering in the holiday travel season this morning. a line of thunderstorms spawning deadly tornadoes on the gulf coast. one twister ripped through amity, louisiana, damaging homes, knocking down power lines. and in mississippi, a storm killed two people and two more