6/8/2012. Brendan Leonard, Mike Caldwell, Nina Williams and Beau Kahler on the CLIMBTALK radio show. Mike Caldwell called into the radio 1190 Live studio from Estes Park. In typical CLIMBTALK style, the conversations range from sky hooking in Yosemite Valley to comp climbing at Teva Mountain Games 20XI in Vail. Sorry about the incessant grinding background noise: we had a bad fan in the wall of the Live studio. And the noise only got worse when Mike Caldwell called in.