Significance The sector is confronted by a range of difficulties, including supply chain strains and crucial long-run manufacturing decisions, wars, rising pressures to reduce the sector’s environmental footprint, and tariff threats. None offer easy resolution. Impacts A US-initiated trade war would have a knock-on effect on aerospace. Pressure to accelerate the shift toward less environmentally damaging commercial air travel will grow at a significant cost. Boeing will struggle to recover fully from the numerous problems it has suffered. Supply chain strains will persist for commercial aircraft and aero-engine manufacturers.