By the numbers

Embassy hostages

52: Number of Americans held hostage by Iran’s Revolutionary Guard in the U.S. Embassy in Tehran

444: Number of days the hostages were held

1981: Year the hostages were released

Jan. 21: Day they were freed, the same day Ronald Reagan was sworn in for his first term as president

Source: www.news.bbc.co.uk/onthisday/hi/dates/stories/january/21