If the odds are anything to go by, West Australian war veteran Brian Walley should not be alive.Eighty-five years ago, during a World War II raid over Germany, his bomber crashed into the North Sea.He drifted for two days in freezing waters, watching all his fellow crew members succumb to exposure, before he was rescued and captured by German soldiers.The then-19-year-old spent three years in a prison camp He doubted he would see another birthday.Yesterday, he turned 104 years old, celebrating the milestone with family who travelled from all over the world to his home in Margaret River, about 300 kilometres south of Perth.Born in 1922 in Cheshire in the United Kingdom, he enlisted in the Royal Air Force a day before his 18th birthday.He is one of the last surviving veterans of World War II, a conflict in which some 60 million people were killed.Recalling his wartime ordeal, he said he was convinced he was going to die."We got shot down, got halfway home, landed in the middle of the North Sea in a howling gale," he said."Five people flapping in the water