WASHINGTON (Reuters) - A driver killed on May 7 in a crash in a Tesla using the car's Autopilot software was speeding, the U.S. National Transportation Safety Board said on Tuesday in its preliminary findings.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=DI1Wzh8PYhY:4I5sP2xi47M:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?d=yIl2AUoC8zA" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=DI1Wzh8PYhY:4I5sP2xi47M:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=DI1Wzh8PYhY:4I5sP2xi47M:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=DI1Wzh8PYhY:4I5sP2xi47M:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=DI1Wzh8PYhY:4I5sP2xi47M:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/DI1Wzh8PYhY" height="1" width="1" alt="" />