Frontline: The War in Ukraine and Global Security "If Putin loses Crimea, he could lose power." The failure of Putin's S-300 and S-400 air defenses has put Crimea at risk for Russia says Maj. Gen. Chip Chapman speaking to Kate Gerbeau on Frontline. The failure of Putin's S-300 and S-400 air defences has put Crimea at risk for Russia says Maj. Gen. Chip Chapman speaking to Kate Gerbeau on Frontline.