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Members of the migrant caravan moving through Central America. Photo: Spencer Platt/Getty Images

President Trump's decision to deploy up to 15,000 troops to the border to handle the migrant caravan traveling north through Central America could cost as much as $200 million by the year's end, the Washington Post reports.

The big picture: The deployments won't put a major dent in the military funds relative to the $716 billion defense budget, but the move goes against the Pentagon's request to cut unnecessary expenditures to battle the federal deficit.

Go deeper

USAID chief tests positive for coronavirus

An Air Force cargo jet delivers USAID supplies to Russia earlier this year. Photo: Mikhail Metzel/TASS via Getty Images

The acting administrator of the United States Agency for International Development informed senior staff Wednesday he has tested positive for coronavirus, two sources familiar with the call tell Axios.

Why it matters: John Barsa, who staffers say rarely wears a mask in their office, is the latest in a series of senior administration officials to contract the virus. His positive diagnosis comes amid broader turmoil at the agency following the election.

Bryan Walsh, author of Future
6 hours ago - Health

COVID-19 shows a bright future for vaccines

Illustration: Annelise Capossela/Axios

Promising results from COVID-19 vaccine trials offer hope not just that the pandemic could be ended sooner than expected, but that medicine itself may have a powerful new weapon.

Why it matters: Vaccines are, in the words of one expert, "the single most life-saving innovation ever," but progress had slowed in recent years. New gene-based technology that sped the arrival of the COVID vaccine will boost the overall field, and could even extend to mass killers like cancer.

7 hours ago - Health

Beware a Thanksgiving mirage

Illustration: Sarah Grillo/Axios

Don't be surprised if COVID metrics plunge over the next few days, only to spike next week.

Why it matters: The COVID Tracking Project warns of a "double-weekend pattern" on Thanksgiving — where the usual weekend backlog of data is tacked on to a holiday.