1.   A few girls stood lookout and shrieked when they caught sight of the boys.

2.   Jorge stood lookout as the killer, Daniel Aguilar Trevino, shot Ruiz Massieu.

3.   There, peering at closeups of brain cells, the scientist in his lab coat stands lookout for a killer.

4.   Armed guards stood lookout on the surrounding hills, as they have for days.