Scotland votes on independence referendum

No supporters for the Scottish independence referendum celebrate a result at a No campaign event at a hotel in Glasgow, Scotland. (AP)

Sept. 19, 2014: No supporters react to results in the Scottish independence referendum at the Marriott Hotel in Glasgow, Scotland. (AP)

Sept. 18, 2014: Supporters of the Yes campaign in the Scottish independence referendum cheer with Scottish Saltire flags as they await the result after the polls closed in George Square, Glasgow, Scotland. (AP)

Sept. 18, 2014: A counting staff member rubs her eyes as they count ballot papers through the night in the Scottish Independence Referendum at the Royal Highland Centre in Edinburgh, Scotland. (AP)

Sept. 18, 2014: A supporter of the Yes campaign in the Scottish independence referendum pulls a face in good humor as he reacts to being photographed as people gather together after the polls closed, in George Square, Glasgow, Scotland. (AP)

Sept. 19, 2014: An official reacts as counting continues in the Scottish Independence Referendum at the Royal Highland Centre in Edinburgh, Scotland. (AP)

Sept. 18, 2014: Scotland's First Minister Alex Salmond looks on at a No campaigner during a walkabout in Ellon, Scotland. (AP)

Sept. 15, 2014: Britain's Prime Minister David Cameron gestures as he makes a speech in Aberdeen, Scotland. (AP)