Dr. Weir is one of the best diplomats in the world. She brokered many treaties for many different countries. These skills are what President Hayes looked for when looking for a new SGC commander. Weir filled in between the vacuum of Gen. Hammond and Gen. O'Neil. When she left the SGC she planned on going back to her former carrier. O'Neil had other ideas and asked her to head up the Atlantis expedition. She agreed with gusto. Now Weir leads her exploratory team from the lost city against the Wraith threat.