Several reports say President Donald Trump has shown off a former Qatar-owned aircraft that has been modified to serve as Air Force One. The aircraft’s prior ownership by Qatar is cited across outlets, along with the fact that it has since been transferred for use by the U.S. Air Force for presidential missions. One source notes that the Air Force has previously stated that the security upgrades required for the jet are expected to cost less than $400 million. The reporting also indicates that the modifications focus on security features and other requirements associated with serving as the presidential aircraft. While the figures mentioned relate to the expected cost of security work, the outlets do not present additional details in the provided excerpts about the timeline of the transfer, the specific systems installed, or the aircraft’s designation within the U.S. fleet. Overall, the coverage centers on Trump’s display of the jet and the earlier Air Force assessment of upgrade costs for security-related modifications.