Lt. J. Paul Vance of the Connecticut State Police conducts a news briefing Saturday in Newtown, Conn. The strategy for dealing with the wave of news media in Newtown echoes that of some past tragedies, experts say.
Police gather at the east entrance of Columbine High School in Littleton, Colo., on April 20, 1999. School security has improved markedly since the Columbine shooting, experts say, but there still are problems.
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This picture received from North Korea's official Korean Central News Agency on Wednesday shows an orbit image of the satellite Kwangmyongsong-3, being monitored on a large screen at a satellite control center in Cholsan county, North Pyongan province in North Korea.
This image from North Korea's official Korean Central News Agency shows the long-range rocket Unha-3 as seen at a satellite control center prior to Wednesday's successful launch.
KCNA via KNS/AFP/Getty Images
An empty container ship waited near the Port of Los Angeles during the eight-day strike by members of the International Longshore and Warehouse Union. The stoppage put a halt to most of the work at the Los Angeles and Long Beach ports.
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Committe Chairman John Kerry , D-MA, speaks during the Senate Foreign Relations Committee hearing on the nomination of Robert Beecroft to be ambassador to Iraq Sept. 19 in the Dirksen Senate Office Building on Capitol Hill in Washington, DC.
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Obama supporters react as President Barack Obama was declared the winner Tuesday, during the Nevada State Democratic Party gathering at the Mandalay Bay Resort and Casino in Las Vegas.