Today in HistoryToday is Monday, April 24, the 114th day of 2017. There are 251 days left in the year.Today's Highlight in History:On April 24, 1967, Soviet cosmonaut Vladimir Komarov was killed when his Soyuz 1 spacecraft smashed into the Earth after his parachutes failed to deploy properly during re-entry; he was the first human spaceflight fatality.