"We want to know what led to this, so we can hopefully try and prevent something similar from happening in the future."

One year ago, when Russia launched its all-out invasion of Ukraine and began Europe's biggest land war since 1945, it waged another battle at home -- intensifying its information blockade in an effort to control the hearts and minds of its own citizens.

Four members of the same family charged in connection with the gruesome killing of Hong Kong model Abby Choi appeared in court Monday, after police said they found what are believed to be parts of her dismembered body, public broadcaster RTHK reported.

GOP leaders are sending warnings that they want former President Donald Trump to play by the rules and put his party above his own interests as he embarks on a third campaign -- that is, to behave in a way he rarely, if ever, has before.

CIA director William Burns discusses Russian President Vladimir Putin's invasion in Ukraine in an interview with CBS News.