ULA launches second Vulcan flight, encounters strap-on booster anomaly Spaceflight NowULA Vulcan launch recap: Live updates from Cert-2 mission Friday from Cape Canaveral Florida TodayVulcan competes second flight despite SRB anomaly SpaceNewsLaunch Roundup: Vulcan takes second flight; Hera mission set to study asteroid NASASpaceflight.com