by Chris STEIN ADDIS ABABA, Ethiopia (AFP) — Ethiopia will observe a national day of mourning Monday as investigators search for bodies and clues into the crash of a Nairobi-bound Boeing minutes after takeoff from Addis Ababa, killing all 157 people on board. Ethiopian Airlines said it will work with Boeing, the national civil aviation authority and international experts in trying to unravel what caused the brand new plane to come down just six minutes […]