Biden Heads Home After Putin Summit: "I Did What I Came To DO"

<p>Biden heads home after Putin summit: "I did what I came to do"; Putin calls talk "Efficient" as he denies, deflects on tough issues; Biden: I told Putin my agenda is not against Russia, it's for Americans; Biden spent "great deal of time" on cybersecurity, told Putin critical infrastructure should be off-limits to any attack; Biden made clear we have area of mutual interest with Russia; </p><p>To learn more about how CNN protects listener privacy, visit cnn.com/privacy</p>