Noble didn't died, they are just MIA ( Halo reach story )

Noble team. The people who tried to save Reach, and died trying. Or did they? Three years after the last ship left Reach, the U.N.S.C come back and try to take back the planet from the Covenant. Soldiers come back from missions say that they were saved or saw a Spartan. Many dismiss these as lies, but slowly, one by one, they come to the compound. Every member comes back, except six. Noble team has a new mission, find Noble Six, before U.N.S.C leave the planet. ( This contains spoilers from the game, if you don't want ruin the game, please read after you have played or seen it.)