Mikhail Khodorkovsky was once the richest man in Russia until he challenged Vladimir Putin and was sent to jail for 10 years. Now, he has advice for Western leaders trying to deal with his former adversary, telling CBC’s Terence McKenna that a show of strength is key. #Putin #MikhailKhodorkovsky #RussiaUkraineWar Watch The National live on YouTube Sunday-Friday at 9 p.m. ET Subscribe to The National: null Connect with The National online: Facebook | https://www.facebook.com/thenational Twitter | https://twitter.com/CBCTheNational Instagram | https://www.instagram.com/cbcthenational More from CBC News | https://www.cbc.ca/news The National is CBC's flagship nightly news program, featuring the day's top stories with in-depth and original journalism, with hosts Adrienne Arsenault and Andrew Chang in Toronto, Ian Hanomansing in Vancouver and the CBC's chief political correspondent, Rosemary Barton in Ottawa.