OMAHA, Neb. (AP) — Prosecutors have charged a woman who told authorities that she intended to shoot co-workers at the Omaha veterans hospital. U.S. District Court records say Tina Hardin has pleaded not guilty to a charge of influencing, impeding or retaliating against a federal official by threats. The records say Hardin had been working as a hospital shuttle bus driver. The records say Hardin, who is black, said she was a victim of racism at the hospital. She also said she wanted to hurt a manager who gave her a bad appraisal.