Before this year’s Dad 2.0 Summit, I’d only been to San Antonio with the Air Force. In July 1995, I spent 4 weeks in field training (which is like basic training, but for college kids in ROTC), and all I knew about San Antonio is it was really hot, the mail took longer than I thought it should take from Alabama, and that under extreme stress, I could go 8 days without pooping. In January 2001, I rode “space available” in a C-130 to a base near San…