 In 1941, the London Philharmonic Orchestra performed a concert to celebrate his birthday, and in 1942, "Time" magazine named him "Man of the Year".When Stalin learned that people in Western countries affectionately called him "Uncle Joe" he was initially offended, regarding it as undignified.There remained mutual suspicions between Stalin, British Prime Minister Winston Churchill, and U.S. President Franklin D. Roosevelt, who were together known as the "Big Three".