Protests swell in major US cities despite curfews, Trump vows to crack down

Thousands of demonstrators took to a knee in the grass outside the US Capitol, chanting "silence is violence" and "no justice, no peace," just before a curfew as peaceful protests against police brutality swelled in major cities on Tuesday.

The throng then stood up and chanted "take a knee" and "who do you protect?" as police faced them from the other side of a metal fence.