SpaceX founder and CEOunveiled the company's Interplanetary Transport System (ITS), which will combine the most powerful rocket ever built with a spaceship designed to carry at least 100 people to the Red Planet per flight. Speaking at the International Astronautical Congress in the western Mexican city of Guadalajara, Musk showed a futuristic video depicting his ideas for an interplanetary transport system based on re-usable rockets, a propellant farm on Mars and 1,000 spaceships on orbit, carrying about 100 people each. The spacecraft would have a restaurant, cabins, zero-gravity games and movies. "It has to be fun or exciting. It can't feel cramped or boring," he said. "What I really want to do here is to make Mars seem possible — make it seem as though it's something that we could do in our lifetimes, and that you can go," he said. Reducing cost would be another key hurdle to establishing a human civilisation on Mars, he said before an overflow crowd at an expo center with a few thousand seats. "We aim to improve the cost per ton to Mars by five million per cent. You can't create a self-sustaining civilisation on Mars if the ticket price is USD 10 billion per person," Musk said.