Sniper Training
Excerpts from U.S. Army Field Manual No. 23-10:

THE IMPORTANCE OF THE SNIPER cannot be measured simply by the number of casualties he inflicts upon the enemy. Realization of the sniper's presence instills fear in enemy troops elements and influences their decisions and actions.

B. In sniper team operations involving prolonged independent employment, the sniper must be self-reliant, display good judgment and common sense. This requires two other important qualifications: emotional balance and field craft.

(1) Emotional balance. The sniper must be able to calmly and deliberately kill targets that may not pose an immediate threat to him. It is much easier to kill in self-defense or in the defense of others than it is to kill without apparent provocation. The sniper must not be susceptible to emotions such as anxiety or remorse. Candidates whose motivation toward sniper training rests mainly in the desire for prestige may not be capable of the cold rationality that the sniper's job requires.

(5) Mental condition. When commanders screen sniper candidates, they should look for traits that indicate the candidate has the right qualities to be a sniper. The commander must determine if the candidate will pull the trigger at the right time and place. Some traits to look for are reliability, initiative, loyalty, discipline and emotional stability.

Images (top to bottom):
1. 7mm shell from the floor of the snipers' nest
2. Montgomery by a sniper's hole (link, 19k jpeg)

See also: Snipers' Nest video, the view of Sarajevo from an abandoned snipers' nest

See also: Sniper fire in Sarajevo, audio for 14.4 and 28.8 kbps

3 (War Begins) - 3a (Survival Map)