On This Day:  June 20

1963 -- After frus­tra­tion around stale come­backs al­most leads to sev­er­al im­pul­sive nu­cle­ar launch­es, the Moscow-Wash­ing­ton hot­line is es­tab­lished in or­der for the two ri­vals to ex­change in­sults in more sat­is­fy­ing re­al time.