Earlier this week, after months of debate and hesitation, the U.S. decided to allow Ukraine to use American made ATACMS missiles on targets inside Russia. Escalations followed, such as Russia signing a new doctrine that lowered the threshold for nuclear attacks. As the tensions ratchet up, there’s still the question of what will happen once Donald Trump takes office.  To break down the gravity of this moment, we talk to David Sanger, longtime New York Times national security correspondent and the author of “New Cold Wars: China’s Rise, Russia’s Invasion and America’s Struggle to Save the West”. For transcripts of Front Burner, please visit: https://www.cbc.ca/radio/frontburner/transcripts