of @Kleinmann:1979aa [see also @Odenwald:1990aa]. DR15 is located in the Cygnus-X South region, located at an estimated distance of 1.4 kpc [@Rygl:2012aa]. The cluster contains one prominent far-infrared source (FIR-1), which marks the location of a compact HII region formed by a pair of B type embedded sources [@Odenwald:1990aa; @Oka:2001aa; @Kurtz:1994aa], however the cluster hosts various intermediate to massive stars which create a rather complex structure of photodissociation regions, forming a nebulous envelope which glows brightly in infrared images (see Figure \[fig:RGB\]). DR15 sits at the tip of a long (about 10 pc), filamentary pillar that extends into the southern edge of the central OB from DR12, lying in projection about 1 degree south from the Cyg-X3 star. The structure of the pillar appears to be protruding from the DR12 ridge (see Figure \[fig:spitzer\]). The DR12-15 region in Cygnus-X possibly lies in front of the OB2 association, along our line of sight. A large filamentary infrared dark cloud (IRDC) with active star formation lies to the north and west of the cluster. This IRDC appears to be kinematically independent from DR15, as shown by @Schneider:2006aa analysis. Recently, the western segment of the IRDC, has been shown to host a young 