Today in HistoryToday is Sunday, April 15, the 105th day of 2018. There are 260 days left in the year.Today's Highlight in History:On April 15, 2013, two bombs made from pressure cookers exploded at the Boston Marathonfinish line, killing two women and an 8-year-old boy and injuring more than 260. Suspected bomber Tamerlan Tsarnaev (TAM'-ehr-luhn tsahr-NEYE'-ehv) died in a shootout with police; his brother, Dzhokhar Tsarnaev (joh-HAHR' tsahr-NEYE'-ehv), was tried, convicted and sentenced to death.