The forgotten child of the Bill of Rights is obviously the Third Amendment.
No Soldier shall, in time of peace be quartered in any house, without the consent of the Owner, nor in time of war, but in a manner to be prescribed by law.
Concerning such a focused - and unlikely to occur event - while the other 10 Amendments in the Bill of Rights seem to constantly be in the news and before the courts, the 3rd has for the most part just drifted along, essentially ignored.
However, yesterday's decision in Kelo raises an interesting question:
Can the federal government avoid compliance with this amendment simply by condeming someone's house and then selling it to Halliburton or another defense contractor who will in return rent it back to the federal government to use as housing?