Flood gates on the Kariba Dam wall between Zimbabwe and Zambia open ceremonially on February 20, 2015 after the two neighbors signed $294 million in deals with international investors. The overhaul project of the world's largest man-made dam will fix deformities and cracks in walls that were discovered in a series of assessments. Those threaten to cause the massive structure to collapse -- an eventuality that would carry unimaginable humanitarian and environmental consequences if water in the 181 billion cubic metre capacity reservoir were freed by a massive breach. Given the high stakes involved, the European Union, World Bank, African Development Bank and the Swedish government agreed to bankroll the critical renovation effort. AFP PHOTO / JEKESAI NJIKIZANA / AFP PHOTO / Jekesai NJIKIZANA (Photo credit should read JEKESAI NJIKIZANA/AFP via Getty Images)