sentences:  In December McNamara and McCone visited Vietnam and wrote a very pessimistic report to Washington expressing concern at the effectiveness of the current policies in Saigon with respect to military gains and rural consolidation, and whether it would lead to a communist takeover.Đôn said that under orders from Harkins, the US officers attached to the four corps commanders had been vigorously trying to convince them of the need to bomb North Vietnam, and by implication, the need to have a coup due to the incumbent government's refusal to allow a bombing campaign.Đôn claimed that such lobbying was influential in convincing some officers to join the coup.