TONIGHT: NUCLEAR ALERT; RUSSIAN PRESIDENT VLADIMIR PUTIN RAISES THE NUCLEAR WEAPONS SPECTER AS HIS MILITARY ADVANCE INTO UKRAINE ENCOUNTERS STIFF RESISTANCE FROM UKRAINIAN FIGHTERS.
TONIGHT: FULL-SCALE INVASION; THE RUSSIAN MILITARY INVASION OF UKRAINE IS OFFICIALLY UNDERWAY, WITH MILITARY AND CIVILIAN CASUALTIES, DEATHS, AND EXPLOSIONS ACROSS THE COUNTRY...