One of the largest Ebola outbreaks in history shows no signs of slowing — and the Trump administration barred US health experts who want to help at the outbreak’s epicenter in the Democratic Republic of Congo from traveling there. The relatively tepid response from the US, at a time when the outbreak is spiraling, has former CDC officials and global health experts concerned. “I do worry that in the worst-case scenario, we could have an outbreak of tens of thousands of people,” said Daniel Bausch, the director of the UK Public Health Rapid Support Team, “and complete destabilization of an already unstable region.”

Donald Trump has threatened to cut off millions of dollars of aid to Honduras if it fails to stop a group of as many as 2,000 migrants fleeing violence and poverty who are attempting to the reach the US border overland. Guatemalan police detained the migrant caravan’s spokesman on Tuesday, a day after the group defied warnings from local authorities and crossed the border from Honduras.

The Trump administration is considering taking back more than $3 billion in foreign aid that Congress already approved, in a move that senators from both parties are calling questionably legal and promising to resist.The Office of Management and Budget instructed the State Department and the U.S. Agency for International Development earlier this month to provide a balance sheet of foreign aid projects that have not yet been funded. Unless Congress intervenes, the money may be returned to the U.S. Treasury at the end of fiscal year on Sept. 30.

The United States has withdrawn from Unesco over what it claims is the organisation’s “continuing anti-Israel bias” – a move that has just been followed by Israel itself.  The US State Department recently announced its intention to withdraw from the UN’s cultural, scientific and educational organisation and become a permanent observer instead.