When one of the poorest countries in the Americas and a little-known Chinese businessman said they planned to undertake one of the biggest engineering projects in history, few people took them seriously.

A year and a half after the $50 billion project to build a canal across Nicaragua was launched by President Daniel Ortega, a former Marxist guerrilla, the doubts have only grown.

Work officially began this week. But reporters hoping to see any evidence of how it would be done in a fraction of the time it took to build the much-shorter Panama Canal, or discover who would pay for it, were left with more questions than answers.