About when did a US/CCCP war become suicidal?

In article ,
(Gareth B) wrote:

If you can point to an official statement from either the whitehouse
or the kremlin that MAD was a "policy", I'd be very interested. My
understanding, from it being beaten into my skull by someone in the US
thinktank industry, is that MAD was NOT a policy, it was a highly
abbraviated expression of the consequences of a large scale nuclear
exchange.

http://www.cnn.com/SPECIALS/cold.war.../mcnamara.dete
rrence/

Pretty much an official summation of "assured destruction," later called
"Mutual Assured Destruction." Not just an acknowledgement of
consequences, but a statement of policy.

--
cirby at cfl.rr.com

Remember: Objects in rearview mirror may be hallucinations.
Slam on brakes accordingly.