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Photo Slideshow: Flag duty

MCGHEE TYSON AIR NATIONAL GUARD BASE, Tenn. – Master Sgt. Jonathan Liermann lowers the state flag of the 38th U.S. state to join the union in 1876, Colorado, as he helps replace a display of state flags here, July 18, 2013. Every six months, Airmen from the I.G. Brown Training and Education Center meet on the parade ground to take down and replace the flags. (U.S. Air National Guard photo by Master Sgt. Kurt Skoglund/Released)

MCGHEE TYSON AIR NATIONAL GUARD BASE, Tenn. – Master Sgt. Jonathan Liermann lowers the state flag of the 38th U.S. state to join the union in 1876, Colorado, as he helps replace a display of state flags here, July 18, 2013. Every six months, Airmen from the I.G. Brown Training and Education Center meet on the parade ground to take down and replace the flags. (U.S. Air National Guard photo by Master Sgt. Kurt Skoglund/Released)

MCGHEE TYSON AIR NATIONAL GUARD BASE, Tenn. – Master Sgt. Jonathan Liermann lowers the state flag of the 38th U.S. state to join the union in 1876, Colorado, as he helps replace a display of state flags here, July 18, 2013. Every six months, Airmen from the I.G. Brown Training and Education Center meet on the parade ground to take down and replace the flags. (U.S. Air National Guard photo by Master Sgt. Kurt Skoglund/Released)

MCGHEE TYSON AIR NATIONAL GUARD BASE, Tenn. – Master Sgt. Jonathan Liermann lowers the state flag of the 38th U.S. state to join the union in 1876, Colorado, as he helps replace a display of state flags here, July 18, 2013. Every six months, Airmen from the I.G. Brown Training and Education Center meet on the parade ground to take down and replace the flags. (U.S. Air National Guard photo by Master Sgt. Kurt Skoglund/Released)

MCGHEE TYSON AIR NATIONAL GUARD BASE, Tenn. -- Every six months, Airmen from the I.G. Brown Training and Education Center meet on the parade ground here to take down and replace the worn flags of the nation's states and territories. Which way goes up on some flags, what state it represents and what flag goes on what pole in the order of statehood is not always so clear, but they said it's an opportunity to familiarize with that and maybe even raise a personal favorite. View the slideshow below to see how they made quick work of the event on July 18, 2013.

Click here to view the Slideshow.