Tanzania launches manhunt after poachers kill British helicopter pilot

DAR ES SALAAM (Reuters) - Tanzanian authorities have launched a manhunt after poachers shot down a helicopter and its British pilot during an operation to track down elephant killers, officials said on Sunday.British pilot Roger Gower was tracking poachers on Friday in the Maswa Game Reserve when his helicopter was hit by an AK-47 rifle fired from the ground, Tanzania's tourism and natural resources minister, Jumanne Maghembe, said.