Eagerly awaiting the arrival of state-of-the-art tanks from Western allies, Ukrainian tank commander Ihor Levchenko told ABC News he's confident that compared to the "rusty and old" contraptions he now operates, the prized armored combat vehicles will give his country "a very significant advantage on the battlefield." Levchenko showed ABC News the Soviet-era-design tanks he and his battalion now use, concealed in a small woodland in eastern Ukraine and within earshot of the constant thud of artillery from the front lines a few miles away. He moved seamlessly and quickly around his T-72 tank, hopping on and off and maneuvering...