Today in history: April 28
In 1788, Maryland became the seventh state to ratify the U.S. Constitution.
In 1945, Italian dictator Benito Mussolini and his mistress, Clara Petacci, were executed by Italian partisans as they attempted to flee the country.
In 1947, a six-man expedition sailed from Peru aboard a balsa wood raft named the Kon Tiki on a 101-day journey to Polynesia.
In 1952, war with Japan officially ended as a treaty that had been signed by the United States and 47 other countries took effect.
In 1980, President Carter accepted the resignation of Secretary of State Cyrus Vance, who had opposed the failed rescue mission to free American hostages in Iran.