From New York, New York

From last.fm:

Run the Jewels is an American hip-hop duo that consists of emcee/producer El-P and emcee Killer Mike. In 2012, El-P produced Killer Mike's critically acclaimed album R.A.P. Music. The following week, Killer Mike appeared on the track "Tougher Colder Killer", from El-P's album Cancer 4 Cure. Both won the acclaim of media and fans across the globe and led to 2012′s legendary, hugely successful “Into The Wild” tour. Read more about Run the Jewels on Last.fm.