BARRY CHRISTIANSON FIREFIGHTERS risked their lives to put out the flames threatening Cape Town. But more than 500 of them might be fired for trying to negotiate better working hours. Sunrise on the morning of 20 April was calm on Signal Hill. Joggers and cyclists were out getting their exercise for the day. Devil’s Peak and Table Mountain poked up through a sea of smoke, with a single plume rising from the mountain. There was a sense of relief in the air. The disaster was finally over.  The fire had been extinguished in most places other than Devil’s Peak. While…