In a proclamation issued Dec. 29, Biden ordered flags across the U.S. to be flown at half-staff for 3 days "in honor and tribute to the memory of President James Earl Carter Jr. and as an expression of public sorrow."

Then-President Joe Biden ordered flags be flown at half-staff for 30 days following the death of former President Jimmy Carter.

North Carolina Governor Josh Stein ordered all U.S. and N.C. flags on state facilities to fly half-staff from sunrise to sunset on Friday in tribute to the victims who died Wednesday night in the crash between an American Airline flight and Blackhawk helicopter over the Potomac River.

Flags in Tennessee and around the U.S. continue flying at half-staff. Here's when they'll return to full-staff.

Flags have flown at half-staff for nearly 30 days following former president Jimmy Carter's death. Here is when flags return to full-staff.