TONIGHT: ON THE BRINK; THE U.S. PUTS 8,500 TROOPS ON \"HEIGHTENED ALERT\" AND THE PRESIDENT RALLIES NATO MEMBERS AS RUSSIAN FORCES CONTINUE TO AMASS ON THE BORDER WITH UKRAINE.
TONIGHT: ON THE BRINK; THE U.S. PUTS 8,500 TROOPS ON \"HEIGHTENED ALERT\" AND THE PRESIDENT RALLIES NATO MEMBERS AS RUSSIAN FORCES CONTINUE TO AMASS ON THE BORDER WITH UKRAINE.
TONIGHT: THE PRESIDENT\'S FIRST PRESS CONFERENCE OF THE YEAR; HIT WITH QUESTIONS OVER THE ADMINISTRATION\'S..