Actor George Clooney has praised the United Nations Peacekeeping Forces in a new public service announcement marking their 60th anniversary. The actor - who was designated a United Nations Messenger of Peace earlier this year - is featured in a segment entitled Peace Is Hard. Clooney's voice is heard over a video of soldiers in the UN forces as they carry out peacekeeping missions throughout the world. He says in the clip: "Peace is certainly more than a celebrity endorsement. Peace is protecting civilians, overseeing elections and disarming ex-combatantsÂ… in places others can't or won't go."