T wo girls, ages 15 and 16, are accused of plotting a "mass casualty attack" on a high school in Texas, authorities say. The girls allegedly planned to use guns and pipe bombs in an attack on ...

Two teenage girls in Texas are accused of plotting a “mass casualty attack” with pipe bombs and guns.(Matt Rourke / AP) Two teenage girls in Texas are accused of plotting a “mass casualty ...

"This type of situation is exactly why the FBI exists.” The FBI became aware on Tuesday of threats that were communicated involving two teenage girls, ages 15 and 16, plotting what the FBI ...