Some experts assert that the US directly facilitated and encouraged the mass murder of hundreds of thousands of suspected Communists in Indonesia during the mid-1960s. Bradley Simpson, Director of the Indonesia/East Timor Documentation Project at the National Security Archive, says "Washington did everything in its power to encourage and facilitate the army-led massacre of alleged PKI members, and U.S. officials worried only that the killing of the party's unarmed supporters might not go far enough, permitting Sukarno to return to power and frustrate the [Johnson] Administration's emerging plans for a post-Sukarno Indonesia." According to Simpson, the terror in Indonesia was an "essential building block of the quasi neo-liberal policies the West would attempt to impose on Indonesia in the years to come". Historian John Roosa, commenting on documents released from the US embassy in Jakarta in 2017, says they confirm that "the U.S. was part and parcel of the operation, strategizing with the Indonesian army and encouraging them to go after the PKI." Geoffrey B. Robinson, historian at UCLA, argues that without the support of the U.S. and other powerful Western states, the Indonesian Army's program of mass killings would not have occurred.