SO, DAN, WHY IS THIS SO UNUSUAL? DAN: PRESIDENTS HAVE BEEN KNOWN TO SAY IN THE PAST THAT NASA’S GOT ENOUGH ON ITS HANDS ON LAUNCH DAY WITHOUT DEALING WITH THE LOGISTICS AND SECURITY OF A PRESIDENTIAL VISIT, ESPECIALLY IF THERE’S A LAUNCH DISASTER. BUT NASA’S ADMINISTRATOR OFFICIALLY IS WELCOMING THE PRESIDENT WITH OPEN ARMS. >> I HOPE YOU WILL JOIN ME. I HOPE YOU -- I HOPE TO PUT YOU ON A ROCKET AND GET RID OF YOU FOR A WHILE. DAN: PRESIDENT TRUMP JOKED LAST WEEK ABOUT MAKING A VISIT, BUT NOW IT’S REALLY SCHEDULED TO HAPPEN, AND NASA’S ADMINISTRATOR SAYS ON TWITTER HE’S EXCITED ABOUT IT. HE PRESIDENT WOULD LIKEL THE LAUNCH FROM SOMEWHERE NEAR THE VEHICLE ASSEMBLY BUILDING, IN A SECURE AREA, OUT OF VIEW OF CAMERAS AND THE MEDIA. HE’D BE A LITTLE OVER THREE MILES FROM THE LAUNCH PAD. PRESIDENT KENNEDY: WE CHOOSE TO GO TO THE MOON. DAN: PRESIDENT KENNEDY, SPEAKING HERE AT RICE UNIVERSITY, WAS A BIG SPACE ENTHUSIAST AND VISITED THE CAPE MORE THAN ONCE. THE KENNEDY SPACE CENTER, NAMED FOR HIM, WAS NOT COMPLETED BEFORE HIS DEATH. LYNDON JOHNSON ATTENDED THE LAUNCH OF APOLLO 11 IN 1969 AS A FORMER PRESIDENT. RICHARD NIXON WAS IN OFFICE AT THE TIME. IN 1978, PRESIDENT JIMMY CARTER VISITED AND SPOKE IN FRONT OF A MOCKUP OF THE SPACE SHUTTLE, WHICH WOULD FLY 2 1/2 YEARS LATER. PRESIDENT GEORGE W. BUSH NEVER VISITED KSC, BUT AT THE JOHNSON SPACE CENTER IN 2004, HE ANNOUNCED THE U.S. WOULD ONCE AGAIN MAKE AN EFFORT TO LAND ASTRONAUTS ON THE MOON. IN 2010, PRESIDENT OBAMA VISITED KSC AND ANNOUNCED THE CANCELLATION OF BUSH’S MOON PROGRAM, REPLACING IT WITH A SOMEWHAT VAGUE PLEDGE TO HEAD FOR MARS SOMETIME IN THE 2030’S. PRESIDENT OBAMA: WE HAVE TO FIX OUR ECONOMY. WE NEED TO CLOSE OUR DEFICITS. DAN: PRESIDENT TRUMP IS TURNING OUT TO BE AS BIG A SPACE SUPPORTER AS KENNEDY, ADVOCATING HUGE BUDGET INCREASES TO GET THE U.S. TO THE MOON BY 2024, AND NO DOUBT WILL USE THIS OCCASION TO UNDERLINE THAT GOAL. THAT SAID, IF THE WEATHER CONTINUES TO LOOK BAD, THERE’S EVERY CHANCE IN THE WORLD THE PRESIDENT MIGHT CHANGE HIS MIND ABOUT COMING.