Philadelphia July 13, 2018 6:15 am Deadly Stabbing Near Rittenhouse Square A bicyclist pulled a knife on a 37-year-old man and stabbed him in the back after getting into an argument over traffic, Philadelphia police said. US & World Videos 8:59 Raise a julep to the Kentucky Derby: The Lineup 0:32 Five people arrested in 2006 Philadelphia cold case 0:19 Body of missing kayaker found in the Schuylkill River 2:00 Police officer placed on administrative duty after killing dog that attacked a man 0:51 Police officer shot and killed 1 of 4 dogs that attacked a 53-year-old man