obama's national security adviser came face to face more than once with the russian leader behind the attacks. >> it was alarming because it was consistent with putin's intent to undermine the institutions of the west. >> russian president, vladimir putin a former kgb spy, famous for his boldness, even ruthlessness. at home some of his opponents end up dead, abroad, his prime target is the u.s. >> there's no doubt in my miebd that vladimir putin was involved from the very beginning, knew all the details and was probe very eager to see, are we really going to pull this off. >> next, a nation brought to its knees by a massive russian cyberattack. >> started asking what's going on, whose in charge.