Russia is signaling it could take out the West's internet and GPS. There's no good backup plan.

• Russia is likely mapping underwater internet cables, a NATO official said.
• It's also believed to be behind flight GPS interference.
• It's signaling it could wreak havoc with the West's electronic infrastructure, say experts.

In June, Dmitry Medvedev, the deputy chairman of Russia's Security Council, issued a stark warning.

The undersea cables that enable global communications had become a legitimate target for Russia, he said.