Anthrax scare for the Minnesota Vikings. Minnesota Vikings football practice was delayed nearly two hours this morning after a player reported finding an unknown white powdery substance on the practice field. Head coach, Mike Tice, immediately suspended practice while police and federal agents were called to investigate. After a complete analysis, FBI forensic experts determined that the white substance unknown to the players was the goal line. Practice was resumed today after special agents decided the team was unlikely to encounter the substance again.