In recent days, Turkey has detained at least 718 people as part of an investigation into the PKK, a Kurdish militant group. The PKK blames Turkish airstrikes on their bases in northern Iraq for the deaths. And in the middle of it all is an already strained relationship between Turkish President Recep Tayyip Erdoğan and President Joe Biden. Marco Werman sorts out the issues with reporter Durrie Bouscaren in Istanbul.
Update: A previous version of this text incorrectly identified the 718 individuals arrested by Turkish authorities.