Secretary of State Hillary Clinton on Thursday rejected claims that the State Department has not offered assistance to the widow of a man allegedly shot down by drug lords while on a jet ski trip on the U.S.-Mexico border. *** She called the killing a "terrible tragedy" and said, "We are sickened by it." *** U.S. Rep. Ted Poe, R-Texas, whose district contains the lake, told FoxNews.com that Tiffany Hartley has not received help from the U.S. Consulate in Mexico to file a complaint against members of the Zeta drug cartel suspected of shooting her husband several weeks ago. "There...