Sean Penn's hunger strike

Hollywood heavyweights Sean Penn and Susan Sarandon are on hunger strike.The pair are staging the protest in support of anti-war activist Cindy Sheehan, whose son Casey was killed in Iraq in 2004.At a press conference in front of the White House, in Washington, Sheehan said: "Everything we do is to get the troops to come home."We want to show the world that there are Americans who are committed to peace. Fasting is such a time-honoured way of protest."Campaigner Sheehan will live on a diet of water, teas and juices until September 21 - International Peace Day.Penn, Sarandon and a host of other stars, including 'Lethal Weapon' actor Danny Glover and country music legend Willie Nelson, will take it in turns to abstain from food on set days in a "rolling programme" of fasts.