COVID-19 variant omicron has not yet been detected in US.

The White House said that if a variant-specific vaccine is needed, the process would include FDA and CDC authorization and would take about three months.

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Olympics testing, Greece snow, Banksy art: World in Photos: Jan.

Olympics testing, Greece snow, Banksy art: World in Photos: Jan.

A look at the top photos from around the globe.

Biden considering sending troops to Eastern Europe: Report.

Biden considering sending troops to Eastern Europe: Report.

ABC News' Rick Klein discusses the possibility of sending U.S. troops to Russia and the continuing talks Secretary of State Antony Blinken is having with officials in Russia and Ukraine.

US orders some evacuations from Ukraine as tensions rise.

US orders some evacuations from Ukraine as tensions rise.

ABC News' Patrick Reevell discusses the rising tensions on the Russia-Ukraine border and more on Ukraine criticizing the U.S.'s decision to partially evacuate its embassy as "premature."

Opening statements begin in federal trial over George Floyd's death.

Opening statements begin in federal trial over George Floyd's death.

Criminal defense attorney Bernarda Villalona looks ahead as opening statements begin in the federal trial of three former officers implicated in George Floyd's death.

Six bodies found in Milwaukee home, homicide investigation underway.

Six bodies found in Milwaukee home, homicide investigation underway.

Officers discovered the bodies while conducting a wellness check at a home in Milwaukee’s Park West neighborhood.