MIT hackers illuminated the Green Building with a bat signal on the night of July 17, in honor of the midnight opening of the 2008 Batman film The Dark Knight. Eric D. Schmiedl—The Tech May. 9, 2016 Facebook Twitter Reddit Print MIT hackers illuminated the Green Building with a bat signal on the night of July 17, in honor of the midnight opening of the 2008 Batman film The Dark Knight. Eric D. Schmiedl—The Tech