Utah National Guard Sgt. Shauna Rohbock fell short of the medal stand yesterday at the 2010 Winter Olympics. Rohbock and brakeman Michelle Rzepka finished sixth overall in the USA-1 sled. The USA-2 sled won the bronze medal, and the USA-3 sled finished fifth. The result was a disappointment for Rohbock, a silver medalist in the 2006 Olympics. ““It wasn’t the Olympics that I dreamed of for four years, but the U.S. got a medal today and that’s amazing,” said Rohbock, a member of the National Guard Outstanding Athlete Program. “That’s awesome. That’s all I want to see, is the U.S.…