A Los Angeles County teenager was sentenced to four years in prison Tuesday after admitting to making more than 375 "swatting calls" in which he made false reports of bomb and mass shooting threats at locations around the U.S. Alan W. Filion, an 18-year-old Lancaster resident, admitted in a plea agreement to carrying out calls targeting places such as high schools, colleges and universities, religious institutions and people such as government officials, according to the U.S. Department of Justice. Federal prosecutors said he intended for the calls to result in major emergency responses by law enforcement. This led to some...