Under proposed changes, it will be illegal to injure or kill any chimpanzee.The U.S. Fish and Wildlife Service recently announced plans to broaden the 'endangered species' classification to all chimpanzees, effectively banning all institutions from abusing or exploiting them. Under the proposed changes, it would become illegal to harm, harass, kill, or injure any chimp, as well as place strict limitations on how they could be transported or sold. At the moment, the U.S. is the only developed country where chimps are used as laboratory test animals -- exposed to diseases and subjected to painful operations for years on end, often without ever seeing sunlight. Their inclusion on the Endangered Species list would make such practices illegal in nearly all cases.