LOS ANGELES (AP) -- A man pulled a semi-automatic rifle from a bag and shot his way past a security checkpoint at Los Angeles International Airport on Friday, killing a federal security officer and wounding at two others in an attack that disrupted more than 700 flights across the U.S., authorities said.Officials said the gunman, who was wounded in a shootout with police and taken into custody, targeted Transportation Security Administration agents, who handle security checks at U.S. airports. 

President Park Geun-hye left for Paris on Saturday on a three-nation European  trip aimed at forging closer economic and financial partnerships, and securing support for her regional peace and cooperation initiatives from major players in global diplomacy. The weeklong trip, which also includes stops in Britain and Belgium, is the last overseas trip in her first year in office. It rounds off a series of visits to important countries, including the United States, China, Russia, and rising Southea

STOCKHOLM (AP) -- Martin Karplus, Michael Levitt and Arieh Warshel have won this year's Nobel Prize in chemistry for laying the foundation for computer models used to understand and predict chemical processes.The Royal Swedish Academy of Sciences on Wednesday said their research in the 1970s has helped scientists develop programs that unveil chemical processes such as the purification of exhaust fumes or the photosynthesis in green leaves. "The work of Karplus, Levitt and Warshel is ground-break