They don't transmit much video live during descent; there's a lot of interference which reduces the available bandwidth enormously. As it is, even voice can be intermittent. As I understand it, they cannot transmit directly to the ground as long as they're enveloped in plasma, so they transmit instead to the TDRS satellites in space, and even this cuts out sporadically due to the physical obstruction of the orbiter's tail during the banking turns it makes to bleed off speed.<br /><br />However, they do routinely videotape events in the cockpit during entry. These are not transmitted to the ground live, but are retrieved from the camera after landing. I've seen parts of one of these broadcast on NASA TV as part of a documentary about Shuttle processing. <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em> -- The Tenth Doctor, "Blink"</font></p> </div>