Photos from the implosion of KU’s McCollum Hall, Wednesday, Nov. 25, 2015.

photo by: Richard Gwin

Explosives blow through windows at KU's McCollum Hall during its implosion Wednesday morning. The building buckled in the middle and crumbled in on itself under a massive plume of dust in about 20 seconds.

photo by: Richard Gwin

McCollum Hall on the Kansas University campus succumbed to 750 pounds of explosives during its implosion on Wednesday morning.

photo by: Richard Gwin

KU's McCollum Hall drops from the center as the '60s-era dorm was imploded to make room for student parking.

photo by: Richard Gwin

KU's McCollum Hall comes crashing down during a planned demolition on Wednesday, Nov. 25, 2015.

photo by: Richard Gwin

Concrete dust flies as KU's McCollum Hall comes down in less than 20 seconds on Daisy Hill.

photo by: Richard Gwin

Hundreds of onlookers watch as crews implode KU's McCollum Hall, Wednesday, Nov. 25, 2015.

photo by: Mike Yoder

Crowds watch as KU's McCollum Hall implodes Wednesday, Nov. 25

photo by: John Young

From left, Stephen Hass, Kayla Everhart and Alex Kerschen react as McCollum Hall is imploded Wednesday morning.

photo by: John Young

Five-year-old Tanner Gregory, left, covers his ears as he, Cy Colistra, 5, center, and Kian Colistra, 6, watch as McCollum Hall is imploded Wednesday morning.

photo by: Richard Gwin

KU's McCollum Hall came down in less than 20 seconds as onlookers watched.

photo by: Mike Frizzell/Contributed Photo

Jefferey Jewsome of Lawrence, a jazz musician, plays Taps for the crowd on West Campus (19th and Iowa) after the implosion of McCollum Hall. Several people shook his hand afterward and the crowd cheered.

photo by: Richard Gwin

Rubble remains after the implosion of KU's McCollum Hall on Wednesday, Nov. 25, 2015.

New York City resident Carlos Ramirez, center, who says he lived in McCollum Hall from 2007 to 2008, examines bricks from the residence hall that were tossed out of the demolition site, Wednesday, Nov. 25, 2015. Joining Ramirez in selecting mementos were, from left in back, Lawrence residents Billy Barnes (McCollum 2013-14) and Chris Edmondson.