MADISON, Wis. (AP) – A Wisconsin golf course is apologizing following a backlash over its advertising of nine holes of golf for $9.11 on the anniversary of the Sept. 11 terrorist attacks.  Tumbledown Trails Golf Course near Madison advertised the special in the Wisconsin State Journal on Monday saying it was meant to commemorate the 12th anniversary of the attacks that killed nearly 3,000 people.  News of the special spread on social media and the golf course’s Facebook page was overrun with negative comments.  Club owner and general manager Marc Watts said Tuesday that no disrespect was intended. He says people are calling the club with death threats and now a sheriff’s deputy is stationed there.  Watts says the club may close Wednesday out of safety concerns.