<a href="https://en.wikipedia.org/wiki/Operation_Barrel_Roll" id="mw-Q" rel="mw:WikiLink" title="Operation Barrel Roll">Operation Barrel Roll</a>, a covert American bombing campaign in <a href="https://en.wikipedia.org/wiki/Laos" id="mw-g" rel="mw:WikiLink" title="Laos">Laos</a> to stop <a class="mw-redirect" href="https://en.wikipedia.org/wiki/PAVN" id="mw-w" rel="mw:WikiLink" title="PAVN">communist infiltration</a> of <a href="https://en.wikipedia.org/wiki/South_Vietnam" id="mw_A" rel="mw:WikiLink" title="South Vietnam">South Vietnam</a>, ends.<sup about="#mwt164" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-30"}}' id="cite_ref-30" rel="dc:references" typeof="mw:Extension/ref"><a href="./March_29#cite_note-30" id="mw_Q" style="counter-reset: mw-Ref 30;"><span class="mw-reflink-text" id="mw_g">[30]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-30"><cite about="#mwt161" class="citation journal cs1" id="CITEREFHead2017">Head, William P. (2017). "Dirty Little Secret in the Land of a Million Elephants: Barrel Roll and the Lost War". <i id="mwCYI">Air Power History</i>. <b id="mwCYM">64</b> (4): 8. <a class="mw-redirect" href="./ISSN_(identifier)" id="mwCYQ" rel="mw:WikiLink" title="ISSN (identifier)">ISSN</a><span id="mwCYU" typeof="mw:Entity"> </span><a class="external text" href="https://www.worldcat.org/issn/1044-016X" id="mwCYY" rel="mw:ExtLink nofollow">1044-016X</a>. <a class="mw-redirect" href="./JSTOR_(identifier)" id="mwCYc" rel="mw:WikiLink" title="JSTOR (identifier)">JSTOR</a><span id="mwCYg" typeof="mw:Entity"> </span><a class="external text" href="https://www.jstor.org/stable/26571062" id="mwCYk" rel="mw:ExtLink nofollow">26571062</a>.</cite><span about="#mwt161" class="Z3988" id="mwCYo" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Air+Power+History&amp;rft.atitle=Dirty+Little+Secret+in+the+Land+of+a+Million+Elephants%3A+Barrel+Roll+and+the+Lost+War&amp;rft.volume=64&amp;rft.issue=4&amp;rft.pages=8&amp;rft.date=2017&amp;rft_id=https%3A%2F%2Fwww.jstor.org%2Fstable%2F26571062%23id-name%3DJSTOR&amp;rft.issn=1044-016X&amp;rft.aulast=Head&amp;rft.aufirst=William+P.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMarch+29"></span></span>