A small Trogdon darted around the van, firing a space gun at an unseen target.

Seconds later, a second missile pursued the first toward its unseen target somewhere beyond the southern horizon.

The defenders were aware of these activities, but could not waste ammunition by firing at unseen targets.

Hitt rose, exposing himself to the unseen targets inside.

Dropping close to the sidewalk, they fired in vain at an unseen target.

Two of his bullets were neatly directed after the unseen target.

But then he saw a tiny snipe that soared across the sky like a dart in search of an unseen target.

A virtual rain of steel and high explosives was falling on the still unseen target.

Oboe or H2S was used to release the markers over the unseen target.

At the head of the escalator the sergeant opened fire on an unseen target below.