third of the world has been exposed to tb, a disease that can reach our shores at the speed of jack trammell. --jet travel. people now discuss with common parlance airport malaria. because we are all traveling around and bumping into people from other countries. these diseases can ruin it economies and threatened the survival of nations and societies. meeting this public health challenge is a moral imperative and a national security concern. fight issued an executive order last week to maintain poorer countries. i propose we give a tax credit to pharmaceutical companies to give them an incentive to develop vaccines for aids, malaria, and tb. the people who need it most cannot afford to pay for it. if we help them pay for it, we can save millions of lives and strengthen our security. if we do not, we will dramatically increase the chances of chaos, murder, the abuse of children, kinds of things we have seen in some of the tribal wars in africa in the last couple of years. finally, there is one more global challenge i want you to think about that i think is a security challenge. the challenge