metropolis is booming, fuelled by nigeria' vast oil reserves. but the city is fast running out of space. one response is a major building project on land which was previously open sea. sand divers play their part in the construction boom. they risk their lives every day to claim this valuable building material from the sea bed. we meet both, the labourers and the visionaries involved at opposite ends of this construction frenzy. everywhere in the nigerian capital lagos -- whether in the business district or the slums -- too many people seem to be crowded into too little space. many of those people are hoping to make money from the ongoing construction boom. the sand used in construction is dredged from the lagoon, a few kilometers from the city center. day laborers spend the night on the boats, and as soon as the sun's up, they start hauling