 Complete the following phrase:  On 27 August 1980, an attempt was made on the lives of the US Ambassador to Lebanon, Dean and his family. Dean, of Ashkenazi descent, had been authorized to deal with the PLO when American Security Interests were involved, something which disturbed Israel., At Deans request  he had sought counsel from Walid Khalidi  Arafat and Abu Walid chief commander of the PLO forces in Lebanon, had intervened by traveling to Tehran in November 1979, to secure the release of 