Vision Council of America and Reed Exhibitions have blocked space at the Sands Convention Center in Las Vegas to hold next year's International Vision Expo West from Sept. 12 to Sept. 14, warning that show dates and venue are subject to change. The new Thursday-Saturday show schedule is meant to accommodate travel in observance of a religious holiday on Sept. 16. Show organizers had counted on holding the exhibition at Las Vegas' brand-new Mandalay Bay Convention Center. The new building was going to be completed in mid-2002, but the Sept. 11 attacks have led to a postponement of the construction schedule.