Space architecture of space and a space transportation infrastructure can be accelerated. Virgin Galactic has indicated plans for an orbital craft, SpaceShipThree. The demand for space tourism is one without bound. It is not difficult to imagine lunar parks or cruises by Venus. Another impetus to become a spacefaring species is planetary defense. The classic space mission is the Earth-colliding asteroid interception mission. Using nuclear detonations to split or deflect the asteroid is risky at best. Such a tactic could actually make the problem worse by increasing the amount of asteroid fragments that do end up hitting the Earth. Robert Zubrin writes:
Cetana PSB International College-English Business Tourism Hospitality Cetana PSB International College-English Business Tourism Hospitality PSB College (Cetana PSB Intellis International College) is a Singaporean - based college located in Ho Chi Minh City, Vietnam. It offers Vietnamese high school graduates an internationally recognized certificate in English, and diplomas in Business Administration, Human Resource Management, Banking & Finance, Marketing, Hospitality & Tourism. PSB College Vietnam is a member of the PSB group of educational institutions, headquartered in Singapore. The College offers programs built around practical learning for the international workplace. PSB Academy in Singapore is accredited by EduTrust Caption status under Singapore's Council for Private Education. This accreditation