Good morning. Late last night near Washington DC, a jet carrying 64 people collided with a US army helicopter above the Potomac river. A frantic rescue operation got underway quickly and was still continuing a few minutes ago, with the precise number of fatalities unclear but multiple bodies seen being pulled from the water.
There is no indication of what caused the crash yet, but there was no sign it was a terrorist incident. For the very latest developments, head to the Guardian’s live blog. Today’s newsletter explains what we know so far. Here are the headlines.