The Microsoft founder and New York Mayor Michael Bloomberg are active in trying to eradicate polio. But immunization efforts have led to deadly attacks from Nigeria to Pakistan.
Off the Nigerian coast, near the country's largest city of Lagos, is a "graveyard" of some 100 grounded and rusted vessels that pose an environmental and security challenge to the oil-producing African country.
Op-ed: Nigeria, Africas most populous country, is also one of the continents most promising. But it has become synonymous with danger. The oil giant, which has already proven its ability to sink into terrible ethnic and religious wars, appears once again headed for deep trouble.
After Indias Bollywood, Nigeria produces the most movies on the planet per year. However, producers have big business drama: only one in ten DVDs is sold legally as piracy runs rampant.