President Trump ordered US flag half-staff effective immediately and returned to full-staff at sunset on April 21, in honor of First Lady Barbara Bush. The State of Maryland Flawill alos be flown at half-staff, as no flag is to fly higher the the US Flag.
Barbara Bush, former First Lady, passed away from declining health on April 17, 2018. You can ready the original statement from the Office of George H.W. Bush here.