Very big. Don't think we'd want to go out that far! Latest schedule has the shuttle moving up a day to the 11th. The GOES-O launch is postponed to the June/July time frame. Cool thing for the shuttle is that there will be two shuttles on pads - Atlantis for the Hubble servicing and Endeavor for an emergency rescue backup. There's mention of Eastern Test Range support of military activities stating the 14th - don't know what is, just that the shuttle can't launch after the 14th due to that support. Could be some things to see...