In honor of all who died on Sept. 11, 2001, all U.S. and Minnesota flags have been ordered to fly at half-staff at all state buildings. 

Gov. Tim Walz issued the order on Wednesday, saying in part that "thousands of innocent lives were lost in an unthinkable tragedy that profoundly changed our nation." 

In the years that followed the terrorist attacks, Sept. 11 was designated as Patriot Day by Congress, which also asked the day be observed as National Day of Service and Remembrance. 

Flags must continue to fly at half-staff until sunset on Sunday, Sept. 14, as the state is still honoring and remembering the victims of the Annunciation Catholic School shooting. Walz and President Trump had initially ordered the flags to be lowered for the shooting victims on Aug. 27. 

Following Walz's declaration, Mr. Trump called for flags to fly at half-staff after 31-year-old Charlie Kirk was killed during an event at Utah Valley University on Wednesday. 

Kirk, at the time, was speaking to a large crowd during an outdoor debate, where he invited students to challenge his political and cultural views. He was shot shortly after 12 p.m. local time.