Law enforcement concerned about copycat vehicle-ramming attacks; Biden to visit New Orleans next week – as it happened

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• New Orleans's famed Bourbon Street tries to return to normalcy after attack

The deadly New Year's Day terrorist attacks in New Orleans and Las Vegas have brought renewed attention to the scourge of extremism in the US military, but efforts to tackle it wilted in the later years of the Biden administration, and are unlikely to be revived once Donald Trump begins his second term this month.

Both the New Orleans vehicle attack that killed 14, and the explosion of a Tesla Cybertruck outside a Trump hotel in Las Vegas in which the driver died, were perpetrated by discharged or serving members of the armed forces.

Some people are having physical symptoms. A lot of people are reminded of the trauma from TV or just being in New Orleans.