The US Department of Commerce has recently launched an investigation into the national security implications of importing commercial aircraft, jet engines, and parts. This investigation, initiated on May 1 but only publicly revealed on Friday, raises the prospect of further tariffs on foreign-made aircraft and components. The move follows growing concerns over the impact of foreign imports on the US aviation industry and national security. While this investigation could influence the global aerospace market, it has also sparked reactions from US airlines and manufacturers who have expressed concerns about the potential economic consequences.