[alexander_busek]

What did the citizen posses[s] that he had to perform sentry duty to protect?

I'm going to go out on a limb here and say, "His life, as well as the lives of his loved ones!"

Regards,

[The_Media_never_lie]

If the citizen is protecting his life and the life of his family, he should find the best defensive position he can find and out of sight. Probably a bedroom which normally has drawn curtains would have been better. I am simply thinking defensively.