If credibility were such a fragile commodity, we wouldn't have needed the Reagan buildup after the Russians blinked during the Cuban Missile Crisis, or in 1973 when they made noises about helping the Arabs in the Yom Kippur war and then backed down.
In 1973, the Russians made noises about helping Arabs in the Yom Kippur war.
The commentary by an independent review panel say that a major contribution of the HEI Renalysis Project is the admission that pollutant values and mortality are not correlated.