Gemini 10, flown by astronauts John W. Young and Michael Collins on July 18-21, 1966, included a successful rendezvous and docking with an Agena target, and EVA (extravehicular activity) by Collins.

The Gemini heatshield was a dish-shaped structure that formed the large end of the reentry module. Constructed of a load-carrying Fiberglas sandwich structure consisting of two 5-ply faceplates of resin-impregnated glass cloth separated by a 0.65inch thick Fiberglas honeycomb core, an additional Fiberglas honeycomb was bonded to the convex side of the sandwich and filled with Dow-Corning DC-325 ablative material.

The attached fragment of Gemini 10 heatshield protected against the heat generated during reentry.