Article Photos: 2014 U.S. Senior Open: Why volunteers are the lifeblood of golf events 1/2

Marshal David Conder keeps an eye on the eleventh fair way as he take a break from the heat in the shade with at bottle of water during the second day of practice for the 67th Senior PGA Championship golf tournament at the Oak Tree Golf Club on Tuesday, May 23, 2006, in Edmond, Okla.   Staff photo by CHRIS LANDSBERGER