Complete the following sentence: Operation Safe Haven, also known as Operation Mercy, was a refugee relief and resettlement operation executed by the United States following the Hungarian Revolution of 1956. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Operation Safe Haven was the most significant European humanitarian airlift since the
Berlin Airlift. Operation, ordered by Pres. Dwight D. Eisenhower was executed almost simultaneously to that launched by Elvis Presley at the closer of his last appearance on the Ed Sullivan Show, as broadcast live to an audience of 54.6 million on January 6, 1957 and which eventually covered a quarter of a million refugees and their settlement in Austria and England.