Pole Vaulter “Grows Through Struggle,” Makes it to London

Team USA pole vaulter Brad Walker says his 2008 injury didn’t stop him from making it to the London Games four years later. In Beijing, Walker’s pole snapped and he teared a disk in his spine. Thanks to Southern California doctors, a new method of surgery – once a risky option – allowed Walker to get back on the track. Dr. Bruce Hensel reports for the NBC4 News at 5 p.m. on Aug. 9, 2012.