Gareth Edwards' Mexican monster movie gets an action-packed trailer

It's been hard to describe Gareth Edwards' monster movie, which is much more focused on the characters and less on the actual aliens that crash-landed in Mexico. But its first trailer gives a little taste of his Monsters.

Synopsis:

Six years after Earth has suffered an alien invasion a cynical journalist agrees to escort a shaken American tourist through an infected zone in Mexico to the safety of the US border.