Sen. John McCain, R-Arizona, takes questions Wednesday at a hospital in Iowa.
GRINNELL, Iowa (CNN) - Before delving into a preview of the healthcare speech he'll deliver Thursday, presidential candidate John McCain lightened the mood in a roomful of medical personnel by offering to show them his X-rays.
In a stop at a medical center the Republican senator from Arizona explained he "had broken bones when [he] was shot down and captured" during the Vietnam War, "and they healed by themselves." He said those images are often published in orthopedic journals.
"So it's kind of an oddity. I'll be glad to show anybody my X-rays," McCain
said laughing. "They're not that exciting, but doctors are kind of dull anyways, you know?"
McCain then joked, "There goes the doctor vote right there."
The White House hopeful will outline his healthcare proposal Thursday in Des Moines.
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– CNN Iowa Producer Chris Welch