Live coverage of Delta 4 countdown and launch

Assembly of a 19-story Atlas rocket started today for a commercial launch next month to aid Mexico’s telecommunications reform aimed at economic growth and the betterment of its societal welfare.

A collection of pad photos from the United Launch Alliance Atlas 5 rocket flight to deploy the Orbital ATK Cygnus commercial cargo-delivery spacecraft for the International Space Station.

NASA’s Mars 2020 Perseverance mission resumed normal operations Friday after cold temperatures forced the spacecraft into space mode soon after a successful launch from Cape Canaveral.