Final fiscal year 2022 numbers show Border Patrol apprehended a whopping 98 watch-listed terrorists at the southern border, six times the record 15 caught there in 2021 (three were caught in 2020 and none in 2019). That's also five times the number it took to carry out the 9/11 attacks that took America to war in overseas theaters for 20 years.
https://www.newsweek.com/record-number-suspected-terrorists-crossed-us-mexico-border-opinion-1754869