Happening in the world: Lt. Gen. Stephen J. Townsend, the senior U.S. commander in Iraq, said that a US airstrike probably caused the collapse of a building in Mosul that killed a number of civilians. He indicated that an investigation will also examine if the attack set off more explosives set by militants in or near the building. (NYT)

Happening in NYC: A basketball has apparently been sitting on the uptown 1 train track at the 18th St. Station for about three weeks. Thanks to its convenient location away from the entranceway, it avoided getting run over some 4,300 times. This incident is raising bigger questions of the ever-deteriorating MTA service, and about debris on the tracks that cause delays. (NYT)

Happening on campus: Columbia China Law and Business Association and Multicultural Business Association are hosting a panel about recruiting for international students. Two upperclassmen and an alumnus in different fields will speak about their experiences as international students navigating the job recruitment process. The panel will be in Lerner 569 from 7:30pm to 8:30pm today.

Overheard: 90 seconds of intense, vicious barking, snarling, and whining at around 9 pm near Broadway and 116th

An old celeb tweet:

How’s that health care bill?