The space shuttle Atlantis with Earth as a backdrop is seen prior to docking with the International Space Station (ISS) in this handout photo provided by NASA and taken on May 16. NASA/Reuters/Handout
In this May 17 photo provided by NASA, astronaut Garrett Reisman, STS-132 mission specialist, takes a self-portrait into his helmet visor while participating in the first of three spacewalks scheduled for the space shuttle Atlantis crew and their Expedition 23 hosts. NASA/AP
This May 17 photo provided by NASA shows the space shuttle Atlantis's cabin, forward cargo bay, and part of the ISS while the two spacecraft remain docked, during STS-132's Flight Day 4 extravehicular activity of astronauts Garrett Reisman and Steve Bowen (not shown). NASA/AP
Crewmembers snap photos and use a laser range-finding device through the aft flight deck windows of the space shuttle Atlantis as they prepare to dock with the ISS in this photo provided by NASA and taken May 16. NASA/Reuters
The space shuttle Atlantis is seen against the Andes Mountains near the border of Argentina and Chile prior to docking with the ISS in this May 16 photo. NASA/Reuters/Handout
NASA astronaut Piers Sellers is seen on the aft flight deck of the Earth-orbiting space shuttle Atlantis during Flight Day 2 activities in this photo taken on May 15. NASA/Reuters
Space shuttle Atlantis lifts off from the Kennedy Space Center at Cape Canaveral, Fla., on May 14. Atlantis's 12-day mission will deliver a Russian-built storage and docking module to the ISS. Marta Lavandier/AP
This May 17 photo provided by NASA shows the space shuttle Atlantis and part of the ISS, while the two spacecraft remain docked during STS-132's flight-day for extravehicular activity of astronauts Garrett Reisman and Steve Bowen (not shown). NASA/AP
Astronaut Piers Sellers rests in his sleeping bag on the mid-deck of the space shuttle Atlantis in this photo taken on May 17. NASA/Reuters/Handout
From left to right, Tracy Caldwell Dyson, STS-132 Commander Ken Ham, and T.J. Creamer hug one another after the space shuttle Atlantis docked with the ISS in this image from NASA TV on May 16. NASA TV/Reuters
In this image provided by NASA, space shuttle Atlantis's cargo bay and its vertical stabilizer intersecting Earth's horizon are seen. A snagged cable forced Atlantis' astronauts to resort to a more inconvenient and less comprehensive method of inspecting their space shuttle on Saturday. NASA/AP
Working toward the insurgent stronghold of Barawe, African peacekeeping troops and Somali forces have regained several towns this year, capturing Bulamareer on Saturday.
ByAbdi Sheik, Reuters
African peacekeeping troops and Somali forces recaptured a southern town from Islamist al Shabaab rebels on Saturday, bringing them a step closer to the insurgent stronghold of Barawe, commanders said.