“Commemorative coins would bring national and international visibility to the history and the mission of the Service as a whole as well as its many parks and programs during the bureau’s centennial year." [Bison slaughter is part of their "mission."]
In Salazar's draft of this bill he states that the National Park Service's core mission is,
"to conserve the scenery and the natural and historic objects and the wild life therein and to provide for the enjoyment of the same in such manner and by such means as will leave them unimpaired for the enjoyment of future generations." ["unimpaired" well it's a little too late for that:P]
Regarding the 100th anniversary of NPS Salazar says it will,
"mark the beginning of the organization's second century of service to the American people as environmental leaders and vigilant stewards of the nation's treasured places and stories." [WOW!]
There will be a surcharge on each coin.
"The proceeds from a surcharge on the sale of commemorative coins will assist the financing of the needs of the National Park Service's parks and programs, helping to ensure that our nation's great natural and cultural resources will endure for generations to come." [More $$$ for bison slaughter]