McALLEN — The vice president of a temporary employment agency pleaded not guilty this afternoon to charges of falsifying work documents and lying to the FBI's Joint Terrorism Task Force during an investigation into a potential al-Qaida plot here. James Eckensberger Jr., vice president of the San Antonio-Based Tollin Group, offered no comment after entering his plea in federal court. Just moments earlier, U.S. Attorney Michael Shelby held a news conference shedding some light on the investigation that began as a search for al-Qaida operatives but ultimately netted 10 undocumented workers without terror links. The Tollin Group operates in McAllen...