The Biden regime covered D.C. with armed troops but opened up the border. And the message is getting through to the bad guys.

 The Customs and Border Protection agency confirmed to Congress today that four people arrested at the southern border since Oct. 1 match names on the FBI’s Terrorist Screening Database, a congressional aide briefed on the correspondence told Axios.

Why it matters: Three of the people arrested were from Yemen and one was from Serbia. The four arrests are more than the number of similar people taken into custody during recent full fiscal years, according to the source. In fiscal 2018, six people from Yemen and Bangladesh were arrested.

The Yemen element is certainly interesting.

These days, Yemen is the leading terror hot zone with Iran’s Houthis, whom the Biden administration has chosen to back, along with elements of Al Qaeda and other Sunni Jihadis. (Anwar Al-Awlaki, if you recall, was based out of Yemen and was taken out there.)

The US also hosts a sizable Yemeni diaspora that was involved in a number of terror incidents: most prominently, the Lackawanna Six.

The Lackawanna Six (a.k.a. the Buffalo Six) was a cell of a half-dozen al-Qaeda operatives of Yemeni heritage who were arrested in Lackawanna, New York (near Buffalo) in September 2002. American citizens by birth, all six were residents of Lackawanna and its community of approximately 3,000 Yemeni Muslims. Their names were Muktar Al-Bakri, Sahim A. Alwan, Faysal Galab, Yahya A. Goba, Shafal Mosed, and Yasein Taher. All in their twenties at the time of their arrests, these six men were recruited into terrorism by two veteran mujaheddin, Kamal Derwish and Juma al-Dosari, who encouraged them to attend a six-week-long weapons course at al-Qaeda’s Al-Farooq training camp in Afghanistan, near Kandahar.

I would suspect that we’re getting training camp vets trying to cross the border. The sorts of people who already know they’re on a list.