This Sunday, almost 2,000 people will take to the stairs of four buildings in downtown Des Moines to raise awareness and funds for American Lung Association research, education and advocacy. Registration is open now for the 2015 Fight For Air Climb. To participate, individuals can either register on the day of the event or raise funds in advance to take on the challenge of climbing to the top of at least one of four Des Moines buildings: EMC Insurance Co. (15 floors), the Hub Tower (18 floors), the Des Moines Marriott Downtown (28 floors), or the Ruan Center (32 floors). Registration is open online until 11:59 tonight. To register after the close of online registration, email EventsIA@Lung.org. For more details on the event, click here.