Manned by three U.S. Navy reservists getting in some summer flight time, an unarmed snub-nosed 52F submarine tracker droned along over international waters one day last week some 15 miles off the Cuban coast. Suddenly, machine-gun fire rose from two small gunboats, apparently Cuban, cruising the blue Straits of Florida below. No hits were scored, but the incident produced a sharp protest from the White House and an equally sharp denial from Fidel Castro. The exchange climaxed a week of rapidly deteriorating relations between the U.S. and Communist Cuba.
Earlier in the week, as if in fear of the large-scale...