A Hubble Space Telescope F160W/F105W/F435W RGB image of 3D-HST GS30274. The images were obtained as a part of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS, Grogin et al. 2011; Koekemoer et al. 2011). The source to the north of our target is a lower-redshift foreground galaxy. The ALMA band 4 continuum detection of 3D-HST GS30274 is shown as contours (2, 3, 4, and 5 sigma). The HST RGB shows an asymmetric light-profile to the west of the core in 3D-HST GS30274, indicative of a recent merger event.