Abortion rights battle, Omicron variant in America & new details in school shooting

: The battle over abortion rights has reached the Supreme Court, whose majority conservative justices appear likely to uphold Mississippi's state law banning abortions. NBC's Justice Correspondent, Pete Williams, explains what the court's decision could mean for Roe v. Wade. The Omicron variant first discovered in South Africa has landed in the United States. The CDC confirmed today that researchers found the Omicron variant in the San Francisco Bay Area. The individual who caught the variant had traveled to South Africa in November and was fully vaccinated. CNBC's Meg Tirrell has the latest on what scientists know and what travel bans could be put into place. A fourth student died in Oxford, Michigan, today after injuries sustained during yesterday's school shooting. New details revealed that the gunman had premeditated intentions after detectives found a journal in his backpack. School officials had met with the teen and his parents the morning of the shooting. NBC's Jay Gray reports from Oxford, Michigan, with the latest details.