Mr. Trump said the U.S. might station commandos on Iraq’s border with Syria, to launch raids and other missions into that country, a strategy the Pentagon proposed after the American withdrawal was announced last week.

Explainer: With the U.S. withdrawal, Iran and Russia will be freer to flex their power in the region. We looked at how Syria’s nearly eight-year civil war is evolving.

Market volatility isn’t over

Stocks in the U.S. fell at the start of trading this morning, continuing Wall Street’s roller-coaster ride and reinforcing fears of a bear market.

The losses today came a day after the S&P 500 had its best one-day performance since 2009 and the Dow Jones industrial average climbed 1,086 points, its biggest single-session point gain ever.