Live coverage: Pegasus launch scrubbed, carrier jet returns to Cape Canaveral

Live coverage of the countdown and launch of a Northrop Grumman Pegasus XL rocket with NASA’s Ionospheric Connection Explorer satellite. Text updates will appear automatically below. Follow us on Twitter.

NASA TV’s live video coverage of the Pegasus XL launch with the ICON satellite begins at 2:45 a.m. EST (0745 GMT). Become a member today and support our coverage.