SINGAPORE - Tracking diamonds, use of photos online, or property ownership - these are some of the ways blockchain can change the world. But much of the buzz now is hype.

Stormtroopers, droids and celebrities from galaxies near and far hit the red carpet in the shadow of a giant AT-AT assault vehicle Saturday at the glittering world premiere of "Star Wars: The Last Jedi" -- although one star almost didn't make it.