Russian Aerospace Defence Forces launched a Soyuz 2-1a from the Plesetsk launch site at 1524 GMT on 5 June 2015. The satellite, dubbed Cosmos 2505 (Kosmos 2505), is known to be one of the last military “Yantar M” class film reconnaissance satellites to be used.
The launch marked a return to flight of the Soyuz 2-1a whose design was implicated in the loss of the Progress M-027M cargo craft after an unforeseen interaction between the craft and the third stage resulted in a faulty separation.