Provided by USA Today: The investigation into Russian interference in the presidential election — and President Trump's counterattack against surveillance and leaking — has brought a new term into the American political lexicon. "Unmasking." Until now, the process for revealing information about U.S. citizens in intelligence reports was almost completely obscure outside of the intelligence community. But the issue has taken on new importance since House Intelligence Committee Chairman Devin Nunes alleged that the Obama administration may have improperly identified Trump transition officials in classified reports he had access to — reports that later turned out to be provided to him by the Trump White House. Here's what we know about the hows and whys of unmasking: