The Pentagon is investigating how parts of the nation's most advanced fighter jet ended up in Hong Kong, with a news outlet reporting Wednesday that China has obtained the F-35 equipment. The F-35 Joint Program Office said in a statement that it and the Defense Department are aware of "a shipment issue" with F-35 components. "We are actively working with U.S. authorities and industry partners to retrieve these components, investigate the incident, and place safeguards to avoid a future occurrence," the office said.