Students wait to pass through a security checkpoint at the University of Pittsburgh's Cathedral of Learning on Tuesday. Security has tightened at the school after a string of false bomb threats on the campus.
Since mid-February, the University of Pittsburgh has received more than 50 bomb threats, and while they've all been false alarms, they have succeeded in disrupting campus life. Tighter security measures are now in place, but the threats continue, and students are wondering how they'll be able to make up class work and prepare for final exams.
A concert in Pyongyang in February 2012 commemorates the birthday of North Korea's late leader, Kim Jong Il. The backdrop shows a North Korean rocket that was launched in April 2009 — and was followed a month later by a nuclear test.
As North Korea reaches the final stage of preparations for a long-range rocket launch, concern is growing that it is in the early stages of preparing its underground test site for another nuclear explosion.
Pyongyang established the pattern three years ago when it tested a similar rocket and then followed it a month later with a nuclear test.
This time around, there may be a more urgent need to test a nuclear device. The bomb is very likely the result of a significant expansion of North Korea's nuclear weapons program.
President Obama has a chance to make fun of his opponents — and himself — when he addresses the annual White House Correspondents' Association gala later this month. Last year he joked about Donald Trump and the "birther" issue.
Credit Martin H. Simon-Pool / Getty Images
<b>LOL:</b> Ann Romney laughs with her husband during a town hall meeting in Youngstown, Ohio, in March.
Credit Gerald Herbert / AP
<b>Spittin' Image:</b> Romney holds up a sketch drawn by a supporter during a campaign stop in Rockford, Ill., in March.
Credit Chip Somodevilla / Getty Images
<b>Wild Thing:</b> Obama growls as he reads <i>Where the Wild Things Are</i> to children at this year's White House Easter Egg Roll.
Credit Jim Watson / AFP/Getty Images
Former Massachusetts Gov. Mitt Romney laughs while addressing supporters at his Super Tuesday campaign rally in Boston on March 6.
At the end of the month, President Obama will deliver a string of punch lines at the White House Correspondents' Dinner. It's an annual tradition, a chance for the man at the top of the pyramid to poke fun at his political opponents and himself.
Humor is an essential tool in any politician's kit — all the more so in an age of instant, constant media. It can disarm an opponent, woo a skeptical voter or pierce an argument. This year, both Obama and presumptive GOP nominee Mitt Romney are using it to try to win the upper hand in the presidential race.
A fisherman uses a lantern while dip-netting for elvers on a river in southern Maine. Elvers are young, translucent eels that are born in the Sargasso Sea and swim to freshwater lakes and ponds, where they grow to adults before returning to the sea.
Credit Robert F. Bukaty / AP
Fishermen in Maine and South Carolina are reaping profits upward of $2,000 per pound for elvers.
There's a gold rush under way on the East Coast of the U.S. for tiny baby eels known as elvers. Fishermen in Maine and South Carolina are reaping profits upward of $2,000 per pound for the fish that are considered a delicacy in Japan.
Elvers have an almost ghostly appearance in the water — their bodies are a cloudy white, skinny as a cocktail straw and no longer than your finger. They look like tiny snakes as they squiggle through the water.
Butch Johnson competes in the 2010 U.S. National Target Championships in Hamilton, Ohio. Johnson is trying for his sixth Olympic Games this summer. When not competing, he manages an archery range in Connecticut. He keeps his Olympic medals under the kitchen sink.