The launcher for Arianespace’s next Soyuz mission from the Spaceport in French Guiana is completing its initial checkout for a flight in the second half of 2012, which will carry another two spacecraft for Europe’s Galileo satellite navigation constellation, according to Arianespace. During activity at the Spaceport’s Soyuz Launcher Integration Building — known by its Russian “MIK” designation — the vehicle’s four first-stage strap-on boosters have been mated with the Block A core second stage, followed by integration of the Block I third stage.