After a successful “wet dress rehearsal” complete with practice countdown Tuesday on the launch pad, United Launch Alliance crews continue targeting Friday morning for the second-ever liftoff of the company’s Vulcan rocket .
Liftoff is scheduled for 6 a.m. EDT from Launch Complex 41 at Cape Canaveral Space Force Station. Forecasters now predict a 80% chance of “go for launch” weather conditions during the three-hour launch window, with cumulus clouds posing the primary threat…