300,265 — the number of people who participated in Michelle Obama‘s successful effort to break the Guinness Record for the most people doing jumping jacks in a 24-hour period. This October in Washington the first lady led about 400 elementary and middle school students in doing jumping jacks on the South Lawn, while other events were held concurrently around the world. On Monday, FLOTUS announced success in an email, according to the Associated Press.
