Today on the Gothamist Newsmap: three pedestrians struck on 65th St. and 7th Ave. in Brooklyn, a tourist bus vs. building incident on 51st St. and Broadway in Manhattan, and a train derailment on East 239th St. in the Bronx. 47 years ago, two planes bound for Laguardia and JFK collided over Miller Field on Staten Island in mid-air. As body parts, Christmas presents, and debris rained from the sky over Staten Island, 132......