It seems that Gabon’s elephants are getting squeezed in a deadly vise between a seemingly insatiable lust for ivory in Asia, where some people pay as much as $1,000 a pound, and desperate hunters and traffickers in central Africa. It is a story of temptation — and exploitation — and it shows that the problem is not just about demand, but about supply as well. Poverty, as well as greed, is killing Africa’s elephants.