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More than 1,300 people are missing after a flash flood in Nepal this week. The explanation for the catastrophe seems to have been a phenomenon called a glacial avalanche. Places downstream of the Himalaya are particularly prone to them. The risk is that, as Earth’s climate warms, they will
become more common.
Elsewhere: in 2015 Donald Trump promised that “I will build a great, great wall.” More than a decade later, the White House is finally building a “smart wall” along America’s border with Mexico. But it may fail at its
most important goal.
Similarly, is Mr Trump’s mass-deportation machine doing more harm than good? Join Edward Carr, our deputy editor, along with a panel of editors and correspondents, to discuss America’s immigration policies on
The Insider
at 6pm BST. | 
