Guam - Last week it was Horizon Lines announcing it was pulling out of Guam, this week Aviation Concepts announces its ceasing operations. The Guam based business jet management and charter company is discontinuing its air ambulance service for "CareJet"  which services  the Marianas Island. "We deeply regret having to move our air ambulance operation to another Asian location", said Aviation Concepts' President and CEO Terry Habeck.  CareJet has served the islands critical care patients for over four years, however, the continuation of these services is no longer feasible, according to a press release. Previously, the "MyLife" air ambulance membership, which provided low cost air ambulance coverage, was discontinued due to lack of subscribers." Aviation Concepts will continue to focus on its core business of an on-demand charter, and management of its executive jet fleet from its headquarters in Tiyan, Guam and its Subic Bay location.