The Live Announcement of Open Workout 16.4, presented by LifeProof, will be held at Schriever Air Force Base in Colorado Springs, Colorado.

The first- and third-ranked women at the 2015 Reebok CrossFit Games, Katrin Davidsdottir and Sara Sigmundsdottir, will perform the workout in the company of Air Force servicemembers.

The event will be broadcast to Games.CrossFit.com on Thursday, March 17, starting at 4:45 p.m. PT. It is not open to the public.