Rev. Ricardo Flippin, a former prostate cancer patient of Dr. Gary Kao, listens during the United States Senate Committee of Veterans Affairs field hearings chaired by Sen. Arlen Specter, D-PA, at the Philadelphia Veterans Hospital Monday, June 29, 2009, in Philadelphia. Kao a University of Pennsylvania radiation oncologist is at the center of the controversy about the Philadelphia VA Medical Center's prostate cancer program. AP Photo logo AP Photo 32 months ago

Rev. Ricardo Flippin, a former prostate cancer patient of Dr. Gary Kao, listens during the United States Senate Committee of Veterans Affairs field hearings chaired by Sen. Arlen Specter, D-PA, at the Philadelphia Veterans Hospital Monday, June 29, 2009, in Philadelphia. Kao a University of Pennsylvania radiation oncologist is at the center of the controversy about the Philadelphia VA Medical Center's prostate cancer program.