U.S. Homeland Security Secretary Jeh Johnson (C) arrives for a news conference after viewing Transportation Security Administration (TSA) security operations and U.S. Customs and Border Protection ... more 
U.S. Homeland Security Secretary Jeh Johnson (C) arrives for a news conference after viewing Transportation Security Administration (TSA) security operations and U.S. Customs and Border Protection Facility at Los Angeles International Airport in Los Angeles, California February 20, 2014. U.S. authorities issued a warning on Wednesday to airlines flying to the United States to watch out for militants who may have hidden bombs in their shoes, U.S. government sources said. REUTERS/Kevork Djansezian (UNITED STATES - Tags: TRANSPORT) less 
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Reuters | Photo By KEVORK DJANSEZIAN / REUTERS
Thu, Feb 20, 2014 8:10 PM EST