US Capitol: police officer and suspect dead after vehicle rams barrier – as it happened

• Officer killed in attack identified as William Billy' Evans
• Full report: one officer and suspect dead after car rams into barrier
• Capitol police lifts lockdown two hours after vehicle attack
• Vaccinated Americans can travel, CDC says
• Economy adds 916,000 jobs as vaccine rollout fuels hiring boom
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Related: Detective says Chauvin knee on neck a 'totally unnecessary' use of deadly force

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Lt Richard Zimmerman, who leads the Minneapolis homicide department, testified today in the trial of Derek Chauvin in the murder of George Floyd, telling the court that Chauvin's actions were totally unnecessary".

The Guardian's Chris McGreal had the story, reporting that Zimmerman - a 4-decade veteran and the longest serving officer on the force - said he hadn't ever been trained that placing a knee on the neck was a strategy for restraint during an arrest.

Related: Detective says Chauvin knee on neck a 'totally unnecessary' use of deadly force