Utility crews made significant progress Tuesday restoring power to homes without electricity since Friday night’s storm, but officials in several jurisdictions announced they were canceling Independence Day celebrations as the recovery continues. Maryland Gov. Martin O'Malley said Tuesday morning that 75 percent of outages in Maryland had been restored, while Virginia Gov. Bob McDonnell reported that power outages in Virginia had been reduced to a fraction of the 1.2 million customers left without lights and air conditioning in the wake of the storm. As of 5 p.m. Tuesday, about 13,000 of 257,000 Pepco customers in the District were still without...