Despite the grim topic of search and – hopefully – rescue, there is something comforting walking past massive stacks of equipment ready to save lives. Orange County Fire Authority Deputy Chief Mike Petro scans orange crates, nods toward an open black case big enough for a rocket launcher. Instead, there is a camera housed in a black steel tube connected to a long cable, earphones, more cable. “We can core a hole through a concrete slab,” Petro says, “put a…