Hypothesis: the use of a video laryngoscope will improve the glottic view compared to direct laryngoscopy, and secondarily, use of the video laryngoscope will reduce the time required to achieve successful tracheal intubation in patients undergoing bariatric surgery. (Weight loss surgery). The three types of video laryngoscopy devices include; the Verethon GlideScope, LMA McGrath and Karl-Storz Video-Mac.