Major World Cities Lit Up the Sky With the Bat Signal for Batman Day

This weekend marks the 80th anniversary of the beloved DC comic book and character Batman. To celebrate the occasion, cities across the globe dedicated one eventful night in true Gotham fashion. New York, Melbourne, Berlin, Tokyo, Rome and more lit up the night sky Saturday with the infamous Bat-signal -- popularly used by Commissioner Gordon in the comics to call the Caped Crusader when major trouble in the city arises. But that wasn't the only way some of these major metropolises honored the D...