The question of the day in New York City on Tuesday — what would you do? — rode on a wave of outrage over a harrowing act the day before. A clearly agitated man pushed a 58-year-old stranger onto the track of an oncoming subway train in Midtown Manhattan. The man, Ki-Suck Han of Elmhurst, Queens, was struck and killed.... One law enforcement official said that the suspect, originally from Africa, Naeem Davis was a peddler and was on the street working when he was taken into custody. The official said that detectives were trying to determine a motive. ..The...