Microsoft co-founder Paul Allen has spent the last six years working on a giant aircraft capable of launching rockets to space. Today, his company Stratolaunch Systems literally rolled that plane out of its hangar in the Mojave Desert for the first time ever.

Mira Saville, 11, spins in her petticoat on the sand at the Nashuva Spiritual Community Jewish New Year celebration on Venice Beach in Los Angeles, California, United States September 14, 2015. As Jews take part in the Tashlich prayer, a Rosh Hashanah ritual, bread crumbs are tossed into the waters to symbolically cast away sins. (Photo by Lucy Nicholson/Reuters)

A girl allows a butterfly to be placed on her nose at the Sensational Butterflies exhibition at the Natural History Museum on April 6, 2011 in London, England. The exhibition is divided up into five sensory zones exploring how butterflies see, hear, taste, smell and touch. The display containing hundreds of butterflies runs from April 12 to September 11, 2011. (Photo by Peter Macdiarmid/Getty Images)

In this handout image provided by Disney Parks titled, “A Tale As Old As Time”, Disney Parks invites guests to “Let the Memories Begin”, spectacular new images have been created by acclaimed photographer Annie Leibovitz. Penelope Cruz and Jeff Bridges appear as Belle and the transformed prince, recalling the final scene from “Beauty and the Beast”. The celebratory moment's tagline reads, “Where a moment of beauty lasts forever”. The campaign premieres as a special insert in the April issues of O, The Oprah Magazine, People, People En Espanol, Real Simple, Essence, and InStyle. (Photo by Annie Leibovitz/Disney Parks via Getty Images)

A model showcases designs by Twenty Seven Names in a photograph as part of New Zealand Fashion Week 2011 at a Newton Gallery on August 30, 2011 in Auckland, New Zealand. (Photo by Sandra Mu/Getty Images)

People look at lighting artist Bruce Munro's latest installation “Field of Light” is seen in the grounds of the Holbourne Musuem on November 23, 2011 in Bath, England. (Photo by Matt Cardy/Getty Images)

Revellers enjoy themselves during Hogmanay celebrations in Edinburgh, Scotland on December 31, 2017. (Photo by Russell Cheyne/Reuters)