Live coverage: Proton launch runs into trouble

A work stoppage at the Ariane 5 rocket’s launch base in South America prevented rollout of the booster to the launch pad Monday, pushing back the liftoff of two communications satellites for Brazil and South Korea until at least Wednesday.

SpaceX teams at Cape Canaveral raised a Falcon 9 rocket vertical at the Complex 40 launch pad and performed a static fire test Friday. The Falcon 9 will be used to launch a commercial geostationary communications satellite no earlier than Monday at 7:10 p.m. EST (0010 GMT Tuesday).

Closing out a banner year of launches, an Ariane 5 rocket thundered into space Wednesday from French Guiana with two commercial communications satellites manufactured in California to expand television and broadband access in Latin America and broadcast television programming in Japan.