Obama to honor young inventors at science fair   Sri Lanka president calls for snap election+   Clinton says Iraqi election might be delayed   Nadal's nemesis Soderling strikes again   Jackson's doctor returns to work at Houston clinic   Greenhouse gas density hit record high in 2008: survey+   Feds find association between drywall, corrosion   Official: China mine that exploded was too crowded   Amended Iraqi election law still angers Sunnis   Ligon Discovery Announces Appointment of Errol B. De Souza as Executive Chairman   Distinguished Executive Joins New York Blood Center Board of Trustees   U.S. home sales at 2-1/2 year high   Inland Waters Pollution Control to Host Community Appreciation Event and Job Fair for Detroit Residents   Hundreds mourn Mich. boy allegedly slain by father   Three Mile Island radiation caused by pipe cutting   October home sales rise 10.1 pct from September   N.Y. stocks rise to yearly high in morning on upbeat housing data+   Nadal loses to Soderling at ATP Final in London   Reportlinker Adds Hand Sanitizers - US Market Trends   World's first "passenger flight on biofuel"