Posted by RCC on 2012-03-25 at 19:50:35 EDT NASA managers have given a "go" for a countdown leading to the launch of five suborbital sounding rockets early in the morning March 27 on a science mission that will briefly create a milky white cloud that may be visible along a large portion of the U.S. east coast. The launch window for the mission will be between 2 and 5 a.m., Tuesday, March 27. The countdown will begin at 9 p.m., Monday, March 26. Clear skies are predicted for the Tuesday launch. However, ground level winds may exceed allowable limits for the flights to occur.Web Cast and Ustream coverage will begin at 10 p.m., Monday, March 26.