An American tourist was killed in Zambia this week when an elephant pulled her from a vehicle and trampled her to death. It was the second fatal elephant attack on a US. tourist this year in the African country. Juliana Gle Tourneau, 64, of New Mexico, was riding with a group of tourists when their vehicle was stopped Wednesday by a herd of elephants near the Maramba Cultural Bridge near Livingtsone, the Associated Press reported. As Tourneau and the others watched the elephants, one pulled her out of the vehicle and stomped her, the wire service reported, citing Southern Province Police Commi…