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.
Trumpâs Transgender Ban Could Force Out Thousands of Service Members. The presidentâs announcement reverses the Obama-era plan to phase in the open participation of these Americans. Secretary of State Rex Tillerson, President Trump, and Defense Secretary Jim Mattis Jonathan Ernst / Reuters.