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Security personal stand before shoes and toys left at the Tornillo Port of Entry, June 2018. Photo: Brendan Smialowski/AFP via Getty Images

The number of migrant children in U.S. custody has surged to more than 13,000, nearing a record high, the San Francisco Chronicle reports.

Why it matters: Close to 18,000 unaccompanied migrant children have been caught illegally crossing the border in just the past two months. The network of nonprofit shelters that house migrant minors until Health and Human Services releases them to family members or other sponsors is nearing maximum capacity.

  • These shelters are already plagued with scandal. In the past, shelters that were quickly opened due to overcrowding resulted in insufficient background checks for personnel and put kids at risk of health and safety dangers, according to the Chronicle.
  • Last year —in the face of a record-breaking numbers of migrant kids in its custody —the U.S. was forced to build a "tent city" in Tornillo, Texas to hold hundreds of migrant children. It closed just earlier this year after the child migrant population fell.

The bottom line: U.S. government agencies charged with implementing immigration policies, protecting the border, detaining immigrants and caring for migrant children are overwhelmed and struggling to handle the surge of migrant families and children crossing the southern border.

Go deeper

U.S. ambassador to Russia will return home briefly: State Department

John Sullivan, U.S. Ambassador to Russia, during a briefing in Moscow in 2015. Photo: Anton Novoderezhkin/TASS via Getty Images

The State Department said Monday that the U.S. ambassador to Russia, John Sullivan, will now be returning to the United States this week before returning to Moscow "in the coming weeks."

Why this matters: The statement, from a State Department spokesperson, comes just hours after Axios reported that Sullivan had indicated he intended to stand his ground and stay in Russia after the Kremlin “advised” him to return home to talk with his team.

Scoop: Leaked Ukraine memo reveals scope of Russia's aggression

Russian President Vladimir Putin visits a military exposition in Sevastopol, Crimea, in Jan. 2020. Photo: Mikhail Svetlov/Getty Images

Russia has been holding last-minute military exercises near commercial shipping lanes in the Black Sea that threaten to strangle Ukraine's economy, according to an internal document from Ukraine's ministry of defense reviewed by Axios.

Why it matters: With the eyes of the world on the massive buildup of troops in eastern Ukraine, the leaked memo shows Russian forces escalating their presence on all sides of the Ukrainian border.

Elon Musk: Autopilot feature wasn't enabled in fatal Texas crash

Photo: Patrick T. Fallon/Bloomberg via Getty Images

Tesla CEO Elon Musk tweeted on Monday that "data logs recovered so far" show the car's Autopilot feature was not enabled — and it did not have access to "full self-driving mode" — in the deadly crash in Texas involving the company's electric vehicle.

Background: Local investigators said they believed the car was operating without anyone in the driver's seat. At the time of death, one man was in the passenger seat, while another was in the rear seat, KPRC 2 reports.