Veteran country star Willie Nelson is heading to Washington, D.C. on Tuesday (13Nov07) to protest the inhumane slaughtering of horses. The singer will be joined by celebrities including actress Bo Derek at Capitol Hill, where they'll show their support for the American Horse Slaughter Prevention Act. In an online letter to his fans, Nelson writes: "Our horses need your help! Join my family, Bo Derek, the Barbi Twins and a host of others in the fight to save our horses. "Horses are living legends of American History yet we continue to slaughter over 100,000 horses annually. Thanks to Animal Welfare Institute (AWI), U.S. slaughterhouses were closed down. "However, the cruel business of slaughter continues by crowding horses in trailers for over 700 miles to Mexico and Canada, without food or water. These plants in Mexico are killing the horses savagely, by multiple stabbings until they drop to their knees in order to slit their throats, causing them to suffer slow painful deaths. "Once again, it's time to flood the phone lines and emails of our legislatures. Ask them to co-sponsor and demand a vote on the American Horse Slaughter Prevention Act."