WALK BY PRIVATE ASTRONAUTS. TOM COSTELLO WITH THE AWE-INSPIRING IMAGES. >> NOW OPENING DRAGON RESILIENCE INTO SPACE. >> Reporter: IT HAPPENED SOMEWHERE OVER AUSTRALIA AND NEW ZEALAND. >> I HAVE A FEELING THE CROWD IS ABOUT TO GO WILD. >> Reporter: FOR THE FIRST TIME EVER, A COMMERCIAL ASTRONAUT OPENED THE HATCH TO HIS SPACEX SHIP, THEN STEPPED INTO THE BLACKNESS OF SPACE. >> WE ALL HAVE A LOT OF WORK TO DO, BUT FROM HERE IT LOOKS LIKE A PERFECT WORLD. >> Reporter: THIS WAS THE RHYS KIEST PART OF A FIVE DAY MISSION, ORBITING FIVE TIMES HIGHER THAN THE SPACE STATION. AND WITHOUT AN AIR LOCK, ALL ASTRONAUTS HAD TO SUIT UP BEFORE OPENING THE SHIP TO THE VACUUM OF SPACE. THOUGH TODAY'S SPACE WALK REALLY MORE OF A SPACE STRETCH. >> THESE ARE THE -- THAT JARED IS PERFORMING. >> Reporter: AS ISAACMAN AND SARAH GILLIS TESTED THEIR BRAND-NEW SPACE SUITS THAT ASTRONAUTS MIGHT ONE DAY WEAR ON THE MOON. ALREADY THEY'VE CLIMBED 870 MILES ABOVE THE EARTH, THE FURTHEST HUMANS HAVE TRAVELLED SINCE THE APOLLO MISSIONS AND THE FIRST TIME WOMEN HAVE TRAVELLED SO FAR, CONDUCTING RESEARCH AND TESTING NEW TECHNOLOGIES, AND POSTING, HELLO EARTH, ON X, USING NEW LASER LIGHT COMMUNICATIONS. NASA CHIEF BILL NELSON SAID TODAY REPRESENTS A GIANT LEAP FORWARD FOR THE COMMERCIAL SPACE INDUSTRY. SENATOR AND RETIRED ASTRONAUT MARK KELLY. >> THIS EXPANDS THE ABILITY FOR COMMERCIAL OPERATIONS, AND WE'RE MOVING TO COMMERCIALIZE MORE