Senior White House policy adviser Stephen Miller watches President Donald Trump speak in the Oval Office. Emails leaked to the Southern Poverty Law Center appear to reveal Miller's familiarity with white nationalist texts and thinkers.
Brendan Smialowski/AFP via Getty Images
Authorities perform an active shooter drill at Park High School on April 27, 2018 in Livingston, Mont. Some experts question the methods of active shooter drills.
William Campbell/Corbis via Getty Images