5aday,
The move of a USAF Special Operations Group into Spangdahlem AB was announced publicly in 2015 - it is not an additional unit.
The USAF 352 SOG is relocating from RAF Mildenhall to Spangdahlem AB as part of the base consolidation program announced in 2015.
RAF Mildenhall to close amid other Europe consolidations - Europe - Stripes