Events throughout the day went according to plan, one exception being an abnormal temperature reading on thruster L5L (see Pre-launch concerns). The launch window was from 3:48:41 to 3:53:02 pm at 3:42, while in the T-9 built-in hold, mission control decided to postpone launch because anvil (thunderstorm) clouds and lightning were detected within of the launch area and path. Launch was rescheduled for 2 July at 15:26. STS-121 was the first launch during which NASA took special precautions to deter vultures, particularly the local turkey vulture, from flying over the area. Efforts included the swift removal of roadkill and other dead animals from areas around the launch site. This followed a near miss during STS-114.