Posted: Wed, Jun 20, 2012, 8:23 AM ET (1223 GMT)
The Proton launch of a commercial communications satellite has been postponed perhaps until July because of a problem with the launch vehicle. The Proton M was scheduled to launch Tuesday from the Baikonur Cosmodrome in Kazakhstan carrying the SES-5 communications satellite. However, the launch was postponed, first for 24 hours and then until further notice, after technicians noticed "out of tolerance telemetry" from a subsystem on the rocket's first stage. Other reports indicated that the problem was in the "steering gear" in the rocket, and the launch would likely be postponed until July.

Related Links:

•  Spaceflight Now article
•  RIA Novosti article
•  The Moscow Times article
•  ILS press release