[RockinRight]

Are these true?

[ShadowAce]

Don’t know, though I have my doubts (The quote about asking for land is iffy, I think—we do have military bases in foreign countries)

[Sherman Logan]

First two have been floating around for some time and are well-attested.

No idea about the others.

[Tanniker Smith]

Checked Snopes about Powell: http://www.snopes.com/politics/quotes/powell.asp

I was actually search for "you could hear a pin drop", figuring that by now, they'd have investigated all of them.

Short answer: the spirit of it is true for Powell, but it was overly simplified. Full text is at snopes.

[jla]

To 4 - No.