cap = end? draw to a close of?

[NewHopeR]

Context:

The retraction, written by Science Editor-in-Chief Bruce Alberts, PhD, caps 2 months of reality TV–worthy activity, including failed attempts to replicate the data, requests by some authors to have their names withdrawn from the article, surreptitious entry into offices, and the arrest of the senior author, Judy A. Mikovits, PhD, on charges of stealing laboratory notebooks and fleeing from Nevada to California to avoid prosecution.

[SoothingDave]

Yes. If you make a beverage, say beer, then putting the cap on the bottle is the final step.

[NewHopeR]

Thank you