Scottish Referendum on Independence - September 14, 2014

Placards showing "Yes" and "No" are displayed on moorland on the Isle of Lewis, in the Outer Hebrides of Scotland, Sept. 14, 2014.

Scotland's First Minister Alex Salmond holds a T-shirt promoting a concert being held in support of a "Yes" vote, in Edinburgh, Scotland, Sept. 14, 2014.

Alistair Darling, the leader of the campaign to keep Scotland part of the United Kingdom, waits before a meeting in Edinburgh, Scotland, Sept. 14, 2014.

A "Yes" supporter with a tattoo of Scotland on his back holds a Saltire flag at a rally outside the BBC in Glasgow, Scotland, Sept. 14, 2014.

Pro-Union 'No' supporters gather during a rally in Edinburgh, Scotland, Sept. 14, 2014.

"Yes" supporters gather at a rally outside the BBC in Glasgow, Scotland, Sept. 14, 2014.

A postal vote for the Scottish Independence Referendum is dropped into a letter box in Moulin, Scotland, Sept. 12, 2014.