ENDANGERED SPECIES: Celebrities sign letter urging Obama to halt elephant poaching, ivory trade Emily Yehle, E&E reporter Published: Tuesday, April 29, 2014 The growing effort to combat wildlife trafficking has officially entered the big leagues: Celebrities are involved. Please subscribe to E&ENews PM to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.