The monument, one of the 27 President Trump is taking a second look at, covers 1.3 million acres (about 5,260 square km), and it includes land considered sacred to Native Americans.
After posting a fourfold rise in profits, world's number one mining company now "actively pursuing options to exit" its US oil and gas business bought for $20B six years ago.
Copper above $3.00 after former workers torch dozens of buildings, vehicles at Freeport's Indonesia operations blocking access to world number two mine.
