It has been 27 years since the end of the Cold War.
US President Donald Trump accuses the Russians of violating a 31-year-old arms treaty. He recently announced that Washington is pulling out of it.
Russian President Vladimir Putin says if he does, Moscow will build new missiles.
Is another arms race about to start?
Presenter: Richelle Carey
Pavel Felgenhauer – defence and military analyst
James Nixey – head of Russia and Eurasia programme, Chatham House
Lawrence Korb – former US Assistant Secretary of Defence