airmail of the United States
... that the first airmail of the United States was a personal letter from George Washington carried on an aerial balloon flight from Philadelphia by Jean Pierre Blanchard?
... that the first <b id="mwCyY"><a class="mw-redirect" href="./Airmails_of_the_United_States" id="mwCyc" rel="mw:WikiLink" title="Airmails of the United States">airmail of the United States</a></b> was a personal letter from <a href="./George_Washington" id="mwCyg" rel="mw:WikiLink" title="George Washington">George Washington</a> carried on an <a class="mw-redirect" href="./Balloon_(aircraft)" id="mwCyk" rel="mw:WikiLink" title="Balloon (aircraft)">aerial balloon</a> flight from <a href="./Philadelphia" id="mwCyo" rel="mw:WikiLink" title="Philadelphia">Philadelphia</a> by <a class="mw-redirect" href="./Jean_Pierre_Blanchard" id="mwCys" rel="mw:WikiLink" title="Jean Pierre Blanchard">Jean Pierre Blanchard</a>?