George Clooney is suffering depression after his last United Nations trip to wartorn Sudan and fears he may be causing more damage than good to the devastated nation. During Clooney's traumatic trip, his first as a United Nations Messenger of Peace, he was confronted by an armed teenage border guard; contracted malaria and narrowly escaped being caught in the middle of gunfire in neighbouring Chad. And he claims the experience prompted him to question if the attention he has brought to the crisis in Darfur - where more than 200,000 people have been killed and more than two million turned into refugees by famine and war - has made the situation worse. He tells Time magazine, "I've been very depressed since I got back. I'm terrified that it isn't in any way helping. That bringing attention can cause more damage. You dig a well or build a health-care facility and they're a target for somebody. A lot more people know about Darfur, but absolutely nothing is different. Absolutely nothing."