Live coverage: 400th Proton rocket takes off with Russian satellite

A Russian Progress cargo freighter lifted off Wednesday from Kazakhstan on top of a Soyuz-2.1a booster and completed a record-breaking 3-hour, 19-minute pursuit of the International Space Station with an automated docking to deliver 2.7 tons of food, fuel, water and other supplies.

United Launch Alliance scrubbed the launch of a Delta 4-Heavy rocket Wednesday night less than 10 seconds before liftoff from Cape Canaveral, the second such abort suffered by this mission.. The launch of a classified National Reconnaissance Office spy satellite is expected to be delayed at least several more days as engineers assess the cause of Wednesday’s last-minute abort.

An experimental microsatellite built and owned by Astro Digital, a California-based company, rode Rocket Lab’s Electron rocket into orbit at 9:22 p.m. EDT Wednesday (0122 GMT Thursday) from New Zealand.