Energy Secretary Jennifer Granholm believes normal service at gas stations across the eastern U.S. will be back to normal by late Sunday after a spate of shortages and long lines driven by a cyber attack on a major pipeline. The problems peaked on Thursday night and outages were down as of Friday afternoon by about 12 percent, with about 200 stations getting gas per hour, Granholm told the Associated Press. “It’s still going to work its way through the system over the next few days, but we should be back to normal fairly soon,” she said. The number of shortages steadily grew after Colonial Pipeline revealed its network was compromised by hackers identified by U.S. authorities as DarkSide, a cybercriminal ring. Over 15,000 gas stations were out of fuel nationwide on May 13. As of Friday night, outages had dropped in some of the worst-hit states, according to data from …