There must be something about cold weather and snow that makes D.C. police officers rather antsy. The New Haven Register reports that a D.C. police officer is facing reckless endangerment and other charges after flashing a semi-automatic gun at a Connecticut bar. Shortly after closing time at the Lager House in West Haven, Danny McCullough III, a member of MPD since 2003, allegedly revealed his weapon and pointed it at the ground when bouncers attempted…