Microbeam radiation therapy uses a lattice of kilo-voltage x-ray âmicro-beamletsâ. The beamlets are 100-300 microns apart (100 microns is roughly the width of a human hair) and each beamlet is 10-50 microns wide.
The National-Security-Law Expert Who Blocked Trump's Travel Ban The former federal prosecutor and deputy counsel to the Department of Homeland Security writes that the prohibition violates the Constitution.
The Department of Homeland Security has begun rolling out President Donald Trump's plans for a wider crackdown on people coming into the United States illegally. Here they are. The federal government said the number of people caught crossing the U.S.-Mexico border has decreased 40 percent since Trump's inauguration.