Trump pardons 9 people convicted of tampering with emission controls on diesel engines

President Donald Trump pardoned nine individuals convicted of violating the Clean Air Act by tampering with diesel vehicle emissions-control systems. The recipients, including mechanics and car tuners, sold or installed devices to bypass emissions controls, which can cause trucks to enter a 'limp' mode limiting speed. Trump argued they were persecuted for 'fixing their car,' citing challenges with emissions systems in harsh conditions.