Lyndon Johnson actually said...

"I also direct that for the same length of time the representatives of the United States in foreign countries shall make similar arrangements for the display of the flag at half-staff over their embass..."

"Second, it is of the utmost importance that there be continuity and stability in United States policies and purposes during this period of international change."

"Our first purpose is peace."

"Third, we shall pursue a course of reasonable and responsible watchfulness."