the third 747 supertanker was developed by global supertanker services which acquired most of evergreen's assets. the global supertanker (n744st, tanker/tail number 944) is a boeing 747-400 dubbed the spirit of john muir. it was certified for firefighting flights by the federal aviation administration in september 2016 and fought fires in chile and israel before being contracted by u.s. officials to fight california wildfires in 2017. it also took part in firefighting in bolivia in august 2019.