Alaska volcano erupts for 2nd day in a row; planes warned

The Alaska Volcano Observatory has raised the aviation warning level after a volcano in the Aleutian Islands erupted again.
Bogoslof Volcano erupted Friday morning, and the observatory says it generated an ash cloud that may be as high as 25,000 feet.
Volcanic ash above 20,000 feet is a threat to airliners flying between Asia and North America.
The volcano 850 miles southwest of Anchorage has erupted more than 25 times since mid-December and could continue periodic eruptions for months. It