Jacqueline_Kennedy_and_family_visit_JFK_grave_circa_1965

The military hats on the evergreen boughs were first left as an impromptu act of respect by the presidential honor guard during the funeral in November 1963, and were continually replaced by military personnel until banned in April 1967. Photo courtesy U.S. Army, public domain.

The military hats on the evergreen boughs were first left as an impromptu act of respect by the presidential honor guard during the funeral in November 1963, and were continually replaced by military personnel until banned in April 1967. Photo courtesy U.S. Army, public domain.

The military hats on the evergreen boughs were first left as an impromptu act of respect by the presidential honor guard during the funeral in November 1963, and were continually replaced by military personnel until banned in April 1967. Photo courtesy U.S. Army, public domain.