Since learning in April that their son, Army Spc. Casey Sheehan, had been killed in Iraq, life has been everything but normal for the Sheehan family of Vacaville. Casey's parents, Cindy and Patrick, as well as their three children, have attended event after event honoring the soldier both locally and abroad, received countless letters of support and fielded questions from reporters across the country. "That's the way our whole lives have been since April 4," Patrick said. "It's been surreal." But none of that prepared the family for the message left on their answering machine last week, inviting them to...