 He negotiated several agreements between DHS and European governments concerning European privacy law and a U.S. legal requirement that airlines provide reservation data about US-bound passengers to the US government (Passenger name records or PNRs).One of these agreements had a "side letter" that abrogated significant parts of the published agreement.In 2009, Baker returned to Steptoe & Johnson, where he currently practices law (and holds the record for returning to the firm more times than any other lawyer).