Koch stood on the stairs as the two police officers talked to Mr. Koch.

WSJ: War Tragedies Strike Families Twice

As workers fled on September 11, many firefighters lost their lives climbing the stairs in the two towers.

FORBES: The Night The Who Saved New York

Wearing the signature red ties of its salespeople, Goklaney and two colleagues brave the monsoon rain to trek up six flights of stairs in a building on Malabar Hill, the city's upmarket residential area.

FORBES: Magazine Article

On her first day at home with me, she climbed two flights of stairs and walked around the block for exercise.

NEWYORKER: Big Med