Wall St. falls in broad selloff; Twitter tumbles<p><a href="http://news.yahoo.com/stock-futures-little-changed-caution-indexes-near-record-120317692--finance.html"><img src="http://l1.yimg.com/bt/api/res/1.2/LA4ECk6vZiTyuP.XV0OjCA--/YXBwaWQ9eW5ld3M7Zmk9ZmlsbDtoPTg2O3E9NzU7dz0xMzA-/http://media.zenfs.com/en_us/News/Reuters/2014-05-06T125411Z_3_CBREA4414V600_RTROPTP_2_MARKETS-STOCKS.JPG" width="130" height="86" alt="Traders work on the floor of the New York Stock Exchange" align="left" title="Traders work on the floor of the New York Stock Exchange" border="0" /></a>By Rodrigo Campos NEW YORK (Reuters) - U.S. stocks fell broadly on Tuesday, closing at session lows, with AIG pulling financial shares lower after disappointing earnings and as a slide in Twitter took down other names in the technology and internet space. Traders also kept an eye on developments in Ukraine, where supporters of Russia and of a united Ukraine are accusing each other of tearing the country apart. "The short-term issue is Ukraine. We don't know when we'll wake up one morning and (Russian President Vladimir) Putin is going to be in eastern Ukraine," said Jack De Gan, chief investment officer at Harbor Advisory Corp in Portsmouth, New Hampshire.</p><br clear="all"/>
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