Mz6 writes "At 5:30PM EDT, one of the space shuttle's protective window covers fell and struck the left Orbital Maneuvering System engine pod on Discovery today. The window cover hit the carrier panel around the OMS pod. NASA is taking a new panel to the launch pad to replace the one hit by the falling cover. NASA is expected to know by 7 PM EDT if the replacement panel will work and whether launch can proceed tomorrow as planned. The window cover in question is from one of the overhead windows. It fell on its own, not when workers were handling it. The cover was found after it had fallen and hit the orbiter. In addition to the carrier panel that workers plan to replace tonight, engineers are looking for any other damage." Update: 07/13 02:03 GMT by T : RmanB17499 points out a CNN story according to which "the launch of the space shuttle Discovery will go ahead as scheduled Wednesday after technicians replaced two protective tiles damaged near the spacecraft's tail Tuesday, a NASA spokeswoman said."