Lebanese President Aoun Discusses Ceasefire In Call With U.S. Vice President Vance And Secretary Of State Rubio; Vance, Rubio Discuss With Aoun Proposal For U.S.-Lebanon-Iran Ceasefire Monitoring Body; Vance, Rubio Tell Aoun Arrangements For U.S.-Lebanon-Iran Ceasefire Mechanism Under Study; Vance, Rubio Reaffirm U.S. Support For Lebanese State Authority In Call With Aoun