8/12/2016 @ 5:07 PM - Firefighters make leap to smokejumping WINTHROP, Wash., Aug 12 (Reuters) - On a 100-degree day in early June, Matt Mueller did sit-ups in a semicircle with seven other experienced firefighters training to parachute into a wildfire. Better known as "rookie candidates," they were determined to make it through the five-week program at North Cascades Smokejumper...