Further development of the Mauna Kea observatories is still opposed by environmental groups and some Native Hawaiians. A 2006 proposal for the Outrigger Telescopes to become extensions of the Keck Observatory was canceled after a judges determination that a full environmental impact statement must be prepared before any further development of the site. The outrigger would have linked the Keck I and Keck II telescopes. Environmental groups and Native Hawaiian activist were a lot stronger at this time than in the past but NASA went ahead with the proposal for lack of an alternate site. The group Mauna Kea Anaina Hou made several arguments against the development including that Mauna Kea was a sacred mountain to Native Hawaiians where many deities had lived, and that the cinder cone being proposed as the site was holy in Hawaiian tradition as a burial site for a demi-god. The group raised several other concerns such as environmental over native insects, the question of Ceded lands and an audit report, critical of the mountain's management.