FORCE POSTURE CHANGES. >> I WANT TO BRING IN WHITE HOUSE CHIEF CORRESPONDENT -- THE ANNOUNCEMENT COMES AS THE PRESIDENT IS IN MADRID FOR THE NATO SUMMIT. WHAT DOES THIS TELL YOU ABOUT THE ADMINISTRATION'S COMMITMENT TO UKRAINE'S NATO NEIGHBORS? WHERE DOES IT MEAN FOR THE THOUSANDS OF SERVICE MEMBERS DEPLOYED? THERE >> YEAH, DIANE, YOU CAN TELL THEY'RE TRYING TO SEND A MESSAGE. THIS WAS A MAJOR MUSCLE MOVEMENT. IT'S INTERESTING THAT THOSE TROOPS IN POLAND, NOW, THE FIRST PERSONAL -- THINK BACK TO YOU BEFORE DRESSES INVASION OF UKRAINE. WE HEARD PRESIDENT PUTIN TALK ABOUT HOW NATO IS ENCROACHING, BECOMING MORE OF A THREAT TO RUSSIA'S BORDERS. CONCERNED ABOUT A BUILDUP OF NATO TROOPS. THAT'S EXACTLY WHAT HE'S GOTTEN. NOW THE UNITED STATES SENDING MORE PERMANENT TROOPS TO POLAND, CLEARLY TRYING TO SEND A MESSAGE. >> AND TURKEY HAS PAVED THE WAY FOR FINLAND AND SWEDEN TO JOIN NATO. WHAT'S THE SIGNIFICANCE OF HAVING THEM JOIN THE ALLIANCE, AND WHAT DOES IT MEAN FOR THE SECURITY OVERALL? >> THE UNITED STATES REALLY CELEBRATING THE STATEMENT. THEY'RE REALLY EXCITED ABOUT THIS SINCE SWEDEN AND FINLAND SAYING THEY WERE FIRST INTERESTED IN THIS. IT REALLY SHOWS THAT NEED HAS BECOME SO MUCH MORE POPULAR IN EUROPE. YOU CAN REMEMBER THAT THOSE TWO LEADERS SAT NEXT TO THE PRESIDENT AT THE WHITE HOUSE, WHEN THEY FIRST APPLIED FOR MEMBERSHIP. BIDEN WANTING TO PHYSICALLY SHOW HIS SUPPORT. NOW IT SHOWS THEY WILL BE INCLUDED IN THE ALLIANCE. WHAT IT MEANS FOR THAN IS THAT WHEN THIS IS ALL SAID AND DONE THEY WILL HAVE THE PROTECTION, THE COLLECTIVE PROTECTION OF THE NATO ALLIANCE. ARTICLE FIVE, IN ATTACK ON ONE IS AN ATTACK ON ALL. NATO TROOPS, IN THEORY, WOULD HAVE TO BE THERE TO PROTECT THEM AND THEIR