Snapshots from Atlas 5 launch

The twin 177-foot-tall solid-fueled boosters for the first flight of NASA’s Space Launch System have been stacked inside the Vehicle Assembly Building at the Kennedy Space Center to await arrival of the rocket’s cryogenic core stage, which is set for a second engine test on a firing stand in Mississippi later this month.

United Launch Alliance called off the launch of a Delta 2 rocket from California’s Central Coast early Tuesday after boats ventured into a restricted safety exclusion zone and engineers ran out of time to resolve a technical problem on the launcher.

Arianespace chief executive Stephane Israel announced an anomaly occurred during Thursday’s flight of an Ariane 5 rocket from Kourou, French Guiana, shortly after the launcher’s second stage engine ignited.