How will Russia retaliate to the mass shooting in Moscow? | Inside Story

It's the worst attack on the Russian capital in more than a decade.
Gunmen opened fire in a crowded concert venue, killing at least 150 people.
An ISIL-linked group has claimed responsibility.
But why is it targeting Russia?
And how did such a major breach of security happen?

Presenter: James Bays

Guests:

Ahmed Rashid -- Veteran journalist who specialises on Afghanistan and Pakistan and the author of best-selling books on the Taliban and Central Asia

Owen Matthews -- Author of 'Overreach: The Inside Story of Putin's War Against Ukraine' and a Russia specialist

Jerome Drevon -- Senior Analyst in Jihad and Modern Conflict at the International Crisis Group. Jerome specialises in non-state armed groups