* Headlines for February 26, 2010 * As Obama Pushes "Clean Coal," Jeff Biggers Tracks History of Destructive Mining in "Reckoning at Eagle Creek: The Secret Legacy of Coal in the Heartland" * Healthcare Summit Ends in Deadlock; Single-Payer Advocates Excluded * V-Day Founder Eve Ensler on "I Am an Emotional Creature: The Secret Life of Girls Around the World"