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When the mission must not fail, the National Command Authority calls in the 
  Tier 1 Operators. And we're not talking about those guys who sell candles 
  and wicker chairs. We're talking "Tier" 1 with a "T." They are the best of 
  the best the elite-est of the elite. To give you an idea of just how elite 
  they are, more than 2 million Soldiers, Sailors, Airmen and Marines serve 
  in our armed forces. Out of those 2 million, about 50,000 fall under the 
  direct control of Special Operations Command. Although their exact numbers 
  are classified, only a few hundred out of those 50,000 make the cut as a 
  Tier 1 Operator. They are living, breathing, precision instruments of war. 
  They are experts in the application of violence. And out of those few 
  hundred, only one, namely you, will step into the boots of one of these 
  elite warriors in the hostile, unforgiving battlefield conditions in 
  present-day Afghanistan. Do you think you have what it takes to confront 
  a new enemy who improvises mercilessly in a new kind of war? Do you think 
  you have what it takes to be Tier 1? We dare you.