a "save mauna kea" movement believes development of the mountain to be sacrilegious. native hawaiian non-profit groups such as kahea, concerned with cultural heritage and the environment, also oppose development for cultural and religious reasons. the multi-telescope "outrigger" proposed in 2006 was eventually canceled. a planned new telescope, the thirty meter telescope (tmt), has attracted controversy and protests. the tmt was approved in april 2013. in october 2014, the groundbreaking ceremony for the telescope was interrupted by protesters causing the project to temporarily halt. in late march 2015, demonstrators blocked access of the road to the summit again. on april 2, 2015, 300 protestors were gathered near the visitor's center when 12 people were arrested with 11 more arrested at the summit. among the concerns of the protest groups are the land appraisals and native hawaiians consultation. construction was halted on april 7, 2015 after protests expanded over the state. after several halts, the project has been voluntarily postponed. governor ige announced substantial changes to the management of mauna kea in the future but stated the project can move forward. the supreme court of hawaii approved the resumption of construction on 31 october 2018. protestors have posted online petitions as a reaction against the thirty meter telescope. the online petition titled "the immediate halt to the construction of the tmt telescope" was posted to change.org on july 14, 2019. the online petition has currently gathered over 278,057 signatures worldwide. some protesters have also called for the impeachment of hawaiian governor david ige because of his support for the thirty meter telescope. on july 18, 2019, an online petition titled "impeach governor david ige" had been posted to change.org and has currently gathered over 62,562 signatures.