aerial-lower Manhattan; plane in air above boats; plane on water; welcoming boat sails to plane; Grover Whalen greets Lindy; more boats in harbor; ticker tape parade for Lindy; police hold back crowds; tilt of front of city hall covered w/ flags and 'Welcome Lindbergh' sign; Mayor Jimmy Walker gives Lindy NYC's Medal of Valor; Lindy in parade w/ mounted police; Al Smith gives Lindbergh New York State's Medal of Valor; CU Lindbergh