Question: Southern Sky Air Tours, d/b/a Direct Air, an airline business based in Myrtle Beach, South Carolina, were operated by Sky King, Inc., Xtra Airways, USA Jet, and Caribbean Sun Airlines, based in what state?
Sentence (from "Yakima Air Terminal"): Sun Country Airlines provide charter flights to Laughlin, NV and Xtra Airways provide charter flights to Wendover, NV.
Relevant evidence: No