Plans to bring facial recognition to major U.S. airports by 2021 are on a fast flight path, despite concerns about the new technology's readiness. President Trump in 2017 issued an executive order expediting the deployment of biometric verification of the identities of all travelers crossing U.S. borders. It stipulates that facial recognition identification be used in the top 20 U.S. airports for "100 percent of all international passengers," including American citizens, by 2021. The mandate to accelerate the timeline for implementation of a biometric system initially was signed into law by President Obama.