Sgt. 1st Class Chase Stevens, senior instructor with Company B, 399th Regiment (Cadet Summer Training), left, checks the rappel lines in the caribiner for Staff Sgt. Michael Soto, right, instructor with Co. B, 399th Regt. (CST) June 5 on the CST Rappel Tower on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Sgt. 1st Class Paul Shelton, training sergeant with Company B, 399th Regiment (Cadet Summer Training), left, checks the rappel lines in the caribiner for Capt. Rebekah Shelton, right, team leader with Co. B, 399th Regt. (CST) June 5 on the CST Rappel Tower on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Sgt. 1st Class Chase Stevens, senior instructor with Company B, 399th Regiment (Cadet Summer Training), right, prepares Spc. Melanie Thomas, a trainer with Co. B, to descend the low wall June 5 at the CST Rappel Tower on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Sgt. 1st Class Paul Shelton, training sergeant with Company B, 399th Regiment (Cadet Summer Training), left, conducts a four-point safety checj with Capt. Rebekah Shelton, right, team leader with Co. B, 399th Regt. (CST) June 5 on the CST Rappel Tower on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Sgt. Marianna Lane, an instructor with Company B, 399th Regiment (Cadet Summer Training), practices the narration of the tough one obstacle June 5 on the confidence course on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Sgt. Marianna Lane, an instructor with Company B, 399th Regiment (Cadet Summer Training), practices the narration of the tough one obstacle June 5 on the confidence course on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Sgt. Marianna Lane, an instructor with Company B, 399th Regiment (Cadet Summer Training), practices the narration of the tough one obstacle June 5 on the confidence course on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Capt. Rebekah McNeilly, a team leader with Company B, 399th Regiment (Cadet Summer Training), negotiates the wing stop and jump obstacle June 5 on the confidence course on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Sgt. Jason Ledbetter, right, an instructor with Company B, 399th Regiment (Cadet Summer Training), practices the narration of the low belly over obstacle June 5 on the confidence course on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Staff Sgt. Rickey Metz, an instructor with Company B, 399th Regiment (Cadet Summer Training), demonstrates the high step over obstacle June 5 on the confidence course on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Staff Sgt. Michael Soto, an instructor with Company B, 399th Regiment (Cadet Summer Training), left, makes an adjustment to the hip rappel seat of Capt. Rebekah Shelton, right, team leader with Co. B, 399th Regt. (CST) June 5 on the CST Rappel Tower on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Spc. Melanie Thomas, a trainer with Company B, 399th Regiment (Cadet Summer Training) prepares to descend the low wall June 5 at the CST Rappel Tower on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Sgt. 1st Class Chase Stevens, senior instructor with Company B, 399th Regiment (Cadet Summer Training), left, checks the rappel lines in the caribiner for Staff Sgt. Michael Soto, right, instructor with Co. B, 399th Regt. (CST) June 5 on the CST Rappel Tower on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Soldiers with 4th Battalion, 399th Regiment (Cadet Summer Training) descend the low wall June 5 at the CST Rappel Tower on Fort Knox, Ky. The Soldiers will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Soldiers with 4th Battalion, 399th Regiment (Cadet Summer Training) descend the low wall June 5 at the CST Rappel Tower on Fort Knox, Ky. The Soldiers will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Staff Sgt. Silvio Herradora, an instructor with Company B, 399th Regiment (Cadet Summer Training), gets in an L-shape stance on the low wall June 5 at the CST Rappel Tower on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)

Sgt. 1st Class Chase Stevens, senior instructor with Company B, 399th Regiment (Cadet Summer Training), leads a block of instruction on tying a hip rappel seat June 5 in a corral at the CST Rappel Tower on Fort Knox, Ky. Soldiers from 4th Battalion, 399th Regiment, will lead thousands of Reserve Officers' Training Corps cadets from across the country through the confidence/obstacle course and rappel tower at Fort Knox this summer starting in early June. (U.S. Army Reserve photo by Master Sgt. Ryan C. Matson)