Springsteen reunited the E Street Band in 1999 on a more lasting basis, for the Bruce Springsteen and the E Street Band Reunion Tour. This posed a dilemma for Weinberg, whose greater loyalty was to O'Brien and NBC. Indeed, up until then Weinberg had never missed a "Late Night" show, appearing in over 1,000 in a row. However, allowing Weinberg to tour for one of the highest-profile reunions in rock history was thought to be of long-term benefit to the television show's appeal, and an arrangement was worked out wherein Weinberg took a leave of absence from "Late Night" in order to go out on this and subsequent tours. When he was tied up with Springsteen, drummer James Wormworth took his place, and the band was led by Jimmy Vivino ("Jimmy Vivino and the Max Weinberg 7"). When the Reunion Tour was extended in length, shows were generally restricted to weekends, so as to permit Weinberg to fulfill his "Late Night" responsibilities. At NBC, the coexistence between the drummer's two bosses was known as the Weinberg-Springsteen Rule, and was not typically extended to other talent at the network.