Check out who was in attendance:
THURSDAY, APRIL 22, 1971
UNITED STATES SENATE;
COMMITTEE ON FOREIGN RELATIONS,
Washington, D.C.
The committee met, pursuant to notice, at 11:05 a.m., in Room 4221, New Senate Office Building, Senator J. W. Fulbright (Chairman) presiding.
Present: Senators Fulbright, Symington, Pell, Aiken, Case, and Javits.
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Also be aware that Kerry was allowed to bring in about 200 VVAW members, who are the people who applaud him at every opportunity. IOW, he was allowed to bring along his own claque.
I don't recall any other Senate witness ever being allowed to do that.