On June 21, 2004, SpaceShipOne reached the final frontier for the first time, notching a huge milestone for private spaceflight and paving the way for space tourism.

How SpaceShipOne's historic launch 20 years ago paved the way for a new space tourism era

Source: space
Source Link: https://www.space.com/spaceshipone-first-private-spaceflight-20-year-anniversary