Tim McGraw, the American Red Cross and State Farm Insurance will promote the Neighbors Give Life blood drive through Sept. 5 in an effort to increase the nation's blood supply. Red Cross officials say there is less than half of the 7-10-day blood supply needed in the event of a national disaster. Only 5 percent of Americans who are eligible to give blood now donate. The sponsors are offering prizes to donors, including tickets to McGraw's concerts and autographed McGraw CDs. State Farm donated $1 million to the Red Cross to start the program.