In video reviews of the latest drone models to his 80,000 YouTube subscribers, Indiana college student Carson Miller doesn¡¯t seem like an unwitting tool of Chinese spies.

Yet that¡¯s how the U.S. is increasingly viewing him and thousands of other Americans who purchase drones built by Shenzhen-based SZ DJI Technology Co., the world¡¯s top producer of unmanned aerial vehicles. Miller, who bought his first DJI model in 2016 for $500 and now owns six of them, shows why the company controls more than half of the U.S. drone market.

¡°If tomorrow DJI were completely banned,¡± the 21-year-old said, ¡°I would be pretty frightened.¡±