Reporting live from George Floyd Square in Minneapolis, Crowther had to take cover as some 30 shots were fired nearby.
EU leaders on Tuesday welcomed the introduction of a bloc-wide Covid-19 pass that they hope will unlock a tourist surge this summer.
About 0.01 percent of people became infected with Covid-19 between January and April despite being fully vaccinated, a US government study confirming the shots' high efficacy showed Tuesday.
Find all of the day's most important Covid-19 news in one place.
Belarus's opposition called Tuesday for more pressure on strongman Alexander Lukashenko as Europe moved to cut air links with the country over the extraordinary diversion of an airliner and arrest of a dissident on board.