The invasion has already begun.

H.G. Wells' War of the Worlds

In this modern retelling of H.G. Wells' classic sci-fi horror, civilization is laid to ruin when a super race of aliens invades Earth. In a blink of an eye, massive "walkers" cover the planet, annihilating all in their path. As cities crumble and human flesh is ripped from the bone, one man struggles to find the one weapon that will turn the tide for mankind.