Thought this was interesting.
Vietnam was ever wasted. The Vietnamese people don't waste a thing - this ought to be a BIG lesson to us!!!
[As an aside, anybody who had been to the Mekong River delta region will likely never forget those red clay soils. ... and just in case you want to know more about Vietnamese soil types ~ go here > the UN's Food and Agriculture Oorganization's Country Pasture/Forage Resource Profiles (sorry, the nascent geologist in me just cropped up)]
You can find more about the F4 series of fighter jets at Wikipedia: McDonnell Douglas F-4 Phantom II.
A single one of these babies (the F-4C) would cost 27,888,870 USD to build today.