Today is National Blood Donation Day, and the American Red Cross is urging Pennsylvanians to donate blood. The day was proclaimed to encourage donations, especially just after the Labor Day holiday when donations often drop. The national effort is aimed at ensuring that there is a steady blood supply. According to the American Red Cross, blood is needed every two seconds for emergencies and treatments like cancer. To donate, visit www.RedCrossBlood.org or call 1-800-RED-CROSS.