Had every intention of a good ride. Made up water bottles the night before, got dressed and out the door. Traffic was heavy but finally got to Key Biscayne. There's a tri this weekend so they were already setting up cones. Construction made everybody ride on the sidewalk of the bridge. Three miles out, BOOM. Flat rear tire. Changed it in the 90 degree heat. Hole in my tire, nursed the bike back to the car, $60 later a new tire and tube. I should have stayed home.