One retired Marine lieutenant colonel from Virginia is the focus of a U.S. federal investigation into the potentially illegal export of military technology. A former Army soldier arrived in Ukraine only to turn traitor and defect to Russia. A Connecticut man who lied about his military service has posted live updates from the battlefield — including his exact location — and boasted about his easy access to American weapons. A former construction worker is hatching a plan to use fake passports to smuggle in fighters from Pakistan and Iran.