Also Monday, U.S. Rep. Carolyn Maloney will announce the renaming of a Manhattan subway station in Koch's honor.

WSJ: Bill Clinton to speak at Ed Koch's funeral in NYC

After the attack, the man, who is thought to be homeless, took the victim's cell phone and left the subway station.

CNN: STORY HIGHLIGHTS

Steps away from City Hall subway station is one of the city's Joseon dynasty palaces, Deoksugung , where you can sample a quieter side of Seoul.

CNN: Look into your Seoul for a hit of Korean flavor