Team B concluded that the Soviet Union did not adhere to the doctrine of mutual assured destruction, but rather believed it could win a nuclear war outright. Pipes—in his "Commentary" article—argued that CIA suffered from "mirror-imaging" (i.e., from assuming that the other side had to—and did—think and evaluate exactly the same way); Pipes further wrote that Team B showed Soviet thinking to be based on winning a nuclear war (i.e., not avoiding such war due to MAD, because, he wrote, the Soviets were building MIRV'd nuclear missiles of high yield and high accuracy—appropriate for attacking hardened missile silos, but not needed for such large and vulnerable 'hostage' sites as cities). This was shocking to many at the time, but Pipes argues that later, after the collapse of the Soviet Union, it was proven to be true.