Massive Power Outage Hits San FranciscoThe subway B line is finally back up and running.Power was restored to the Seventh Avenue-53rd Street station several hours after an outage crippled it during the morning commute.The track juice went out at about 7:25 a.m., causing the MTA to suspend the line from end to end.power was restored to the station at 12:36 p.m., MTA officials said.The express train rumbles from Brighton Beach...