Payload Specialists
... that Byron K. Lichtenberg and John Glenn were respectively the first and the last Americans to fly as Payload Specialists on board the Space Shuttle?
... that <a href="./Byron_K._Lichtenberg" id="mwBvo" rel="mw:WikiLink" title="Byron K. Lichtenberg">Byron K. Lichtenberg</a> and <a href="./John_Glenn" id="mwBvs" rel="mw:WikiLink" title="John Glenn">John Glenn</a> were respectively the first and the last <a href="./United_States" id="mwBvw" rel="mw:WikiLink" title="United States">Americans</a> to fly as <b id="mwBv0"><a class="mw-redirect" href="./Payload_Specialist" id="mwBv4" rel="mw:WikiLink" title="Payload Specialist">Payload Specialists</a></b> on board the <a href="./Space_Shuttle_program" id="mwBv8" rel="mw:WikiLink" title="Space Shuttle program">Space Shuttle</a>?