 On April 6, 2009 US Secretary of Defense Robert Gates announced that the US would buy a total of 2,443 JSFs.In April 2009, the "Wall Street Journal" reported that computer spies, allegedly Chinese but acknowledged to be from uncertain sources, had penetrated the database and acquired terabytes of secret information about the fighter, possibly compromising its future effectiveness.The state-run Aviation Industry Corporation of China (AVIC) later incorporated the stolen data into China’s Chengdu J-20 and Shenyang FC-31 fighters.