KRS-One began his recording career as one half of the hip hop group Boogie Down Productions alongside DJ Scott La Rock. They met during a stay KRS-One had at the Bronx's Franklin Armory Shelter. La Rock (real name Scott Sterling) worked as a social worker there. The duo would begin to create music. After being rejected by radio DJs Mr. Magic and Marley Marl, KRS-One would go on to diss the two and those associated with them, sparking what would later be known as The Bridge Wars. Additionally, KRS had taken offense to "The Bridge", a song by Marley Marl's protege MC Shan (later on, KRS One produced an album with Marley Marl in 2007); the song could be interpreted as a claim that Queensbridge was the birthplace of hip hop. Though MC Shan has repeatedly denied this claim. Still, KRS "dissed" the song with the BDP record "South Bronx"; a second round of volleys would ensue with Shan's "Kill That Noise" and BDP's "The Bridge Is Over". KRS-One, demonstrating his nickname "The Blastmaster", gave a live performance that devastated MC Shan, and many conceded he had won the battle. Many beleive this live performance to be the first MC battle where rappers attack each other, instead of a battle between who can get the crowd more hyped.