On the Sports Shooter web site, Getty Images' Al Bello has posted a wonderful collection of the photos he captured at this month's US Olympic Team Trials in swimming.
Bello shot above the water with Canon EOS-1D Mark II cameras and a range of lenses, including the EF 15mm f/2.8 Fisheye, EF 16-35mm f/2.8L USM and EF 70-200mm f/2.8L IS USM.
A remote setup consisting of a Canon EOS-1D, EF 15mm f/2.8 Fisheye and Speedlite 550EX recorded the underwater photos from inside a custom-built housing.
More of Bello's photographs can be found on his web site.