Roger Goodell is issuing a reminder to all NFL personnel about the dangers of impaired driving. According to CBSSports.com, the commissioner has sent a memo to all 30 NFL clubs entitled, "Responsibility and Safety." It comes after a rash of recent DUI arrests. In the memo, Goodell reminds players, coaches and other team employees about the need to be responsible, avoid potential trouble and to use available league resources for help. The memo comes as many teams are wrapping up minicamps and breaking before the start of training camp next month.