Commentary China is vacuuming up a U.S. amphibious aircraft company that produces sophisticated airplanes with foldable carbon-fiber wings. The planes are recreational, but their transformation into militarized drones that target U.S. and allied forces is a distinct possibility that has the Americans who used to lead the company up in arms and complaining to our own apparently indifferent government in Washington. The FBI and other U.S. entities are finally upping their inquiries, but apparently only after heroes in the California company cried foul and pointed to “obvious” attempts by the China-backed shareholders to hollow it out. For national security reasons, Congress, the FBI, and the Committee on Foreign Investment in the United States (CFIUS), led by the Treasury Department, should take immediate and much tougher action to unwind the sale and return the company to full U.S. ownership. On Jan. 18, Kate O’Keeffe at The Wall Street Journal reported the …