OAKLAND Mourners from across the country packed Oracle Arena to the rafters Friday, as the city and nation said a heavy-hearted goodbye to four Oakland police officers fatally shot in the line of duty March 21. The funeral service for Sgts. Mark Dunakin, 40, of Tracy, Erv Romans, 43, of Danville, Daniel Sakai, 35, of Castro Valley, and motorcycle Officer John Hege, 41, of Concord, was attended by the state's highest elected officials and at least 10,000 police officers, and came at the end of perhaps the saddest week in Oakland Police Department history. "Never in the entire 160 years...