Pvt. John Hubbard of the 3rd U.S. Infantry Regiment places American flags at the graves of U.S. soldiers buried in Section 60 at Arlington National Cemetery in preparation for Memorial Day in Virginia.
Barack Obama boards Air Force One at the Des Moines International Airport in Iowa after attending a campaign event.
Michael Loccisano/Getty Images for Zynga
A group of Zombies take to the streets in New York City for a "zombie blood drive" in celebration of the global launch of Zynga’s latest mobile game "Zombie Swipeout" for the iPhone and iPod touch.
This image provided by NASA-TV shows the SpaceX Dragon commercial cargo craft after Dragon was grappled by the Canadarm2 robotic arm and connected to the International Space Station.
Olympic torchbearer Zara Phillips arrives on her horse Toy Town as she brings the Olympic flame to Cheltenham Racecourse in Cheltenham, England.
Justin Sullivan/Getty Images
A tourist on a bicycle stops to photograph the Golden Gate Bridge in San Francisco, Calif. The 75th anniversary of the iconic bridge will me marked with a festival this weekend.
Amy Sancetta/AP
People watch as hot air balloons are lit up in the darkness at the annual 'Balloon Glow" as part of the Blossom Time festival in Chagrin Falls, Ohio.
Vivid Sydney via Getty Images
The Sydney Opera House is illuminated as part of Vivid Sydney in Sydney, Australia. Vivid Sydney is the largest festival of lights in the Southern Hemisphere with more than 60 art and light installations displayed throughout the city.
Monkeys quench their thirst as another takes a dip on a hot summer afternoon on the outskirts of Jammu, India.
Dan Kitwood/Getty Images
Mike De Butts adds the finishing touch to a giant Baobab Tree sculpture entitled 'Under the Baobab,' outside of the Southbank Centre in London, England.
