Team Ukraine competes during the synchronized swimming free combination final at the European Swimming Championships in Budapest, Hungary, in 2010. Francois Xavier Marit/AFP Photo/Newscom/File
Park Tae-hwan of South Korea competes in one heat of the men's 400m freestyle swimming event at the 16th Asian Games in Guangzhou, China, in 2010. Francois Xavier Marit/AFP Photo/Newscom/File
A worker dressed as a hare performs with a sea turtle at Richina Underwater World in Beijing on Jan. 31. Zumapress.com/Newscom/File
Divers participating in the Lower Keys Underwater Music Festival pretend to play musical instruments off the Florida Keys in 2000. Bill Keogh/AFP Photo/Newscom/File
Trainees in spacesuits assisted by scuba divers train in a pool at the Russian Cosmonauts Training Center at the Star City outside Moscow on Feb. 18. Underwater training simulating conditions of weightlessness is part of space crews' training. Sergey Ponomarev/AP/File
A sea-shanty band performs under water. The group, called 'Fisherman's Friends,' took to the water in an attempt to take part in 51 concerts in 24 hours – appropriately performing a rendition of 'When The Boat Comes in.' Wenn.com/Newscom/File
A ballerina from the National Ballet of Panama dances underwater in a swimming pool in Panama City in 2008. ZUMA Press/Newscom/File
Divers wear a new custom-made Shark Walker helmet allowing visitors to walk underwater, surrounded by sharks, giant stingrays, and hundreds of fish, at the Melbourne Aquarium in Melbourne, Australia, in 2010. William West/AFP/Getty Images/Newscom/File
Chinese pop singer Huang Zheng (above c.) plays the guitar and sings during an underwater music show at Dalian Sun Asia Ocean World in Dalian, China, in 2007. EyePressNews/Newscom/File
The Weeki Wachee Mermaids perform an underwater ballet among the sea creatures of the Sea Life London Aquarium in London in 2010. Whitehotpix/Newscom/File
Hezbollah fighters fired antitank missiles at a convoy, killing two Israeli soldiers. The much-anticipated reply to an Israeli strike 10 days before showed the challenge both sides face: retaliation without escalation.
The Lebanese militant group Hezbollah has launched its most severe attack on Israeli forces since 2006, when a cross-border incident set off a summer war. Wednesday's strike drew Israeli retaliation, but analysts suggested both sides were aiming for restraint.