NASA, Orbital ATK and United Launch Alliance (ULA) now are targeting launch of Orbital ATK’s seventh commercial resupply services mission to the International Space Station at 9 p.m. EDT Friday, March 24. An option exists to move the launch earlier to March 23, if the Eastern Range becomes available. The additional time allows the ULA team to replace and retest a first stage hydraulic component. Orbital ATK has contracted with ULA for its Atlas V rocket for the launch service, which will lift off from Cape Canaveral Air Force Station in Florida. Orbital ATK’s Cygnus cargo spacecraft is packed with 7,600 pounds of supplies and research for crew aboard the orbiting laboratory.