Part of the historical site at Wounded Knee is up for sale. Should it be developed as a landmark or left in peace out of respect for the Sioux people who died there?

A 40-acre parcel of land that's part of the massacre site is up for sale, and its owner has given the tribe until 1 May to come up with the $3.9m (£2.5m) asking price.

If they don't, land owner James Czywczynski says he will be forced to accept one of several offers he has already secured from commercial buyers, who may attempt to capitalize on the land as a tourist attraction.

Many Lakota Sioux say it is a greedy act of blackmail, for land that is worth less than $10,000 on the open market.

The owner claims he was told by a government expert to start with a price of $100,000 per acre, based on the land's historic significance.