March 29, 1848: For the first time in recorded history, <a href="/ce6/us/A0835554.html">Niagara Falls</a> stopped flowing. An ice jam in the Niagara River above the rim of the falls caused the water to stop.
March 29, 1867: The <a href="/ce6/history/A0808990.html">North America Act</a> was passed by the British parliament, creating the dominion of <a href="/node/70464">Canada</a>.
March 29, 1951: <p><a href="/ce6/history/A0842422.html">Julius and Ethel Rosenberg</a> were found guilty of passing atomic secrets to the Russians and were sentenced to death.</p>
March 29, 1971: Lt. William Calley was convicted of murdering 22 Vietnamese civilians in the <a href="/ce6/history/A0834642.html">My Lai</a> massacre.
March 29, 1973: The last U.S. troops left South <a href="/node/70622">Vietnam</a>.
March 29, 1999: The <a href="/cgi-bin/id/A0196608">Dow Jones industrial average</a> closed above 10,000 for the first time, at 10,006.78.
March 29, 2002: <a href="/node/70516">Israel</a> declared <a href="/ce6/people/A0804490.html">Yasir Arafat</a> an enemy.
More events from This Day in History: March 29