Only one intern position worth having.
In line with Mr. Johnson's above comment: The only intern position worth having in this venture would be as an intern to the project economist, assuming there is one. If there is such an economist on board, interning under said economist would the equivalent of an opportunity to intern under the world's greatest master magician - a magician capable of pulling a a giant hat out of a garden variety rabbit.
While I admire Mr. Cameron's ambition and imagination, his understanding of economic probabilities are sadly lacking - while his understanding of critical earth resource priorities is non-existent. It's always easy to stir ones imagination with the possibility of vast wealth. From man's survival perspective one resource's availability under it's current economic paradigm should take precedence over all others. Given current world population, and expected growth in the next 50 years, the world is going to run out of cheap rock phosphate as a resource to fuel its Green Revolution's food machine - which 95% of the earth's humans are already absolutely food dependent upon. In spite of 40 years of intensive R&D on replacing our diminishing reserves of cheap rock phosphates, no new economically equivalent phosphorous source has been developed. Without phosphorus to make the petroleum dependent NPK fertilizers, the earth's natural phosphorus replenishment cycle is only capable of maintaining about 2 billion people, not the 7 B we have now not the 10-15 50 years from now. Mr. Cameron, quit pissing away your resources and prioritize their use.