Have We Crucified the Flesh?

Now those who belong to Christ Jesus have crucified the flesh with its passions and desires.  (Galatians 5:24)
Is the flesh dead? What would that even mean? And why are we believers the ones doing the crucifying here instead of God?
Yeong called from Seoul, South Korea, to ask about this challenging passage in Galatians 5.
Here are my thoughts on the verse and how it fits into our understanding of our new identity in Christ.