How does the author show or build suspense in "The Sniper" through characterization, setting, or point of view?

O'Flaherty builds
suspense through setting.The narrator tells us early on that theis
on a rooftop and that he is a "Republican sniper" facing the Free Staters in the Irish
civil war.The city of Dublin lies in "darkness" and the sound of "heavy guns
roared."One can hear "machine guns and rifles" in the silence, and the sniper's
eyes have "the cold gleam of the fanatic" because he is "used to looking at
death."All of these details -- the war, the darkness, the imminent danger, the sniper's
description as somewhat ruthless and accustomed to death -- build suspense because they create
such a foreboding and menacing mood.

The sniper's
also contributes to the suspense in the story because we see that
he is young and does not always make the smartest decisions.This makes the reader fearful,
perhaps, that he will do something to jeopardize his own safety, and he does.For example, he
pauses to consider whether or not he should light a cigarette.Common sense...