In light of the developments of the "Manhattan Project" and the
support structures and sites placement on the US National Register
(though perhaps given US "sovereign nation" stated status on some (or
all?) reservations they should perhaps be UNESCO international sites,
also an international effort, including reports of enriched uranium
captured from Germany) it should be noted that, according to
declassified material released circa 1978, that some railroad boxcars
were listed as "turquoise" ore in bills of lading and perhaps labeled
as such, that had actually contained uranium ore. Apparently also a
problem on some reservations as people excavated it without protection
from said ore.

George Myers