Tomorrow morning's scheduled launch of the space shuttle Columbia has been canceled due to cold temperatures. The launch has been rescheduled for 0618 EST Friday morning. As a result, notam 2/1659 has been canceled, while the less restrictive notam 2/1612 remains in effect ( see graphic). A new notam will be issued amending the effective times of the canceled restriction. This larger and more burdensome restriction, a result of heightened security concerns post-9/11, will be activated again sometime Thursday evening and run through Friday morning. Should another delay occur, the next launch window shouldn't arrive for several days. AOPA will continue to provide updates as they become available. As always, pilots are encouraged to contact St. Petersburg FSS prior to undertaking any flights near the Cape.