Is there a rift between the U.S. Secret Service and Metro police about Saturday's Nashville visit from First Lady Michelle Obama? Chief told Nashville's News 2 Thursday morning, "[It's] just a difference of philosophy in terms of the motorcade. We have people in place, we are communicating daily with the Secret Service."The Chief added that the "difference in philosophy was limited solely to the motorcade, on all other pages; we are on exactly the same page, same mission, same team." Nashville's News 2 reported Wednesday that the Tennessee Highway Patrol will be involved in the motorcade security for the First Lady. News 2 first reported this week that Metro police had been left out of the planning for part of the security for Mrs. Obama's visit.The First Lady will deliver the graduation address Saturday for Nashville's Martin Luther King High School.The event is scheduled for the Gentry Center at Tennessee State University. Chief Anderson indicated Metro Police have plans for additional security around the North Nashville school.