Russia has charged four suspects it says carried out the attack in a Moscow concert hall that killed at least 137 people.
Rutherford B. Hayes (Wikipedia) Rutherford Birchard Hayes (/ˈrʌðərfərd/; October 4, 1822 – January 17, 1893) was an American military officer and politician who served as the 19th president of the United States from 1877 to 1881.
Russian special services received US data on terror plot, but without any details — source (tass.com) The source in the Russian special services said that “such information had been indeed received”