Anatahan Volcano erupted Wednesday morning, shooting a thick plume of ash 50,000 feet into the air and darkening the skies over this tiny U.S. territory in the Pacific. Officials have placed Anatahan Island off limits until further notice, advising aircraft to exercise caution and avoid coming within 10 nautical miles of the area. Ronald Dela Cruz of the Saipan Emergency Management Office said children were sent home early from school as ash fell on Saipan and Tinian, but there were no injuries or major disruptions reported. Gov. Juan N. Babauta issued a health advisory, urging residents with lung problems to stay indoors and warning people against drinking water contaminated with ash. Motorists were told to avoid driving in heavy ash, because it could clog engines and stall vehicles. The eruption is at least the fourth in the past two years. The Northern Mariana Islands, about 3,800 miles southwest of Hawaii, have nine active volcanoes. They are home to about 70,000 people. I vacationed on Saipan a few years ago, beautiful place. You can still see the wreakage of landing craft in the water just off the beach.