Activision have released a teaser trailer for Call of Duty: Modern Warfare 3. This was just moments after a few details have been leaked for the upcoming shooter. Subtitled “America Under Siege,” the all-too-brief clip drives home the fact that a focus of the modern combat occurring in this instalment will be the USA’s own front lawn, New York to be precise. I have also added in the other teasers from Europe. Check it out below.