How to Defeat Tempest - the final boss in Gears of War 3

Trying to take out Tempest, the last boss fight in Gears of War 3? You'll find her in Act 5, Chapter 6 of the game. Take a look at this gameplay video to find out just exactly what you'll need to do to defeat her and beat Gears of War 3! Be careful, the ending of Gears of War 3 is hinted at towards the end.