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.
What it's like in the 6 countries on Trump's travel ban list. Updated 12:29 PM ET, Mon March 6, 2017. Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.