What Turkey's Operation Olive Branch in Afrin means for Syria's future?

What Turkey's Operation Olive Branch in Afrin means for Syria's future?

Turkey says the YPG’s links to the PKK terror group poses a direct threat to Turkey’s national security. The group took control of Afrin after the Syrian regime withdrew in 2012. Recently, the US said it would arm and train a new border force made up of YPG and allied Arab militias. Sandra Gathmann explains.