1.   If a head popped up to study the terrain, a bullet followed from the other side.

2.   During each training mission, Holloway said, he studies the terrain, notes previously unseen transmission wires, hovers over anything unfamiliar to take a closer look.

3.   During each training mission, Matthew said, he studies the terrain, notes previously unseen transmission wires, hovers over anything unfamiliar to take a closer look.

4.   High in the sky, a bald eagle soars on the wind, silent, its sharp eyes studying the terrain for a meal.