Retired Australian swimmer and Olympic gold medalist Grant Hackett puts his skills and strength to the test while he rolls up a ramp to enter a public bus in a wheelchair, in Sydney, Australia, Monday, Nov. 9, 2009. Hackett and other Australian personalities traded walking for wheelchairs to experience the life of a paraplegic as part of spinal awareness week. AP Photo logo AP Photo 27 months ago

Retired Australian swimmer and Olympic gold medalist Grant Hackett puts his skills and strength to the test while he rolls up a ramp to enter a public bus in a wheelchair, in Sydney, Australia, Monday, Nov. 9, 2009. Hackett and other Australian personalities traded walking for wheelchairs to experience the life of a paraplegic as part of spinal awareness week.