Los Angeles Times April 17, 2010 12:08 p.m.
President Obama has canceled plans to travel to Poland for the funeral of President Lech Kaczynski.
A White House statement cited hazardous flying conditions posed by the ash cloud from the erupting volcano in Iceland.
The cloud has forced huge portions of European airspace to be closed. The fear is that microscopic particles of highly abrasive ash could endanger passengers by causing aircraft engines to fail.