The GlideScope is one example of video laryngoscope, and has been in use here at CDHA for 10 years. It has been extensively studied over the ten years, with more than 300 studies appearing in the literature. The investigators know from these studies that it is very effective at delivering a view of the larynx when direct laryngoscopy has failed to do so. However, getting the tube to and through the larynx into the trachea, even with a good view, can be problematic. Furthermore, it is the impression of some clinicians that when a close-up, full view of the larynx is obtained (as is optimal for direct laryngoscopy) with the GlideScope, tube passage appears to be a little more difficult than seems to be the case when only a partial view of the larynx is obtained, from a little further away. The investigators don't know why this may be so, but may relate to one or more of a number of reasons, including (when too close) angling the larynx into an unfavorable angle, or (when further away) more favorably reducing the angle between mouth and larynx and trachea. However, no guidance on this question appears in the peer-reviewed medical literature, and no studies have been done. There is some suggestion in non peer-reviewed internet sites on airway management that a partial view may be better, but again, this has not been scientifically studied or validated one way or another.