the gunman who shot and killed a sheriff's deputy, early saturday morning, he was sitting in his car in san antonio when a small white car pulled up and opened fire and so far, no word on any suspects. ♪ >> gregg: baby boomers are spawning a boom in knee and hip surgery. >> heather: many are refusing to stop and smell the roses and are seeking replacements for the worn out joints to keep up with their active lifestyles and joining us is dr. earnest penny, senior attending physician of emergency medicine at st. barn ba st. barnabus hospital in the bronx and, you brought fred along. are joint replacements the cure all. >> for certain indication, they are wonderful, the problem is