KANSAS CITY, Mo. (AP) – The Kansas City Chiefs and St. Louis Rams will use Friday night’s preseason game at Arrowhead Stadium to benefit the tornado recovery efforts in Joplin, Mo.  The city was devastated by a tornado on May 22 that killed more than 150 people and caused an estimated $2 billion in damage.  Joplin is only now finishing debris removal and turning its attention to rebuilding its infrastructure.  The Chiefs and Rams both visited the town to assist in the recovery effort his summer.  They plan to recognize rescue teams and volunteers on Friday night, along with collecting donations from fans. About 500 volunteers and residents of Joplin will attend the game, and the coaching staffs will wear special shirts and hats to raise awareness of the recovery effort.