Wikia

Call of Duty: Modern Warfare 3 has debuted at the Electronic Entertainment Expo (E3)

Two of the videos are shown below

Information from the videos:

Confirmed weapons:
- G18
- AK-74u
- AA-12
- SPAS-12
- AK-47
- P90
- AT4
- XM25
  - New XM25 scope
Mission objective is to infiltrate a Russian submarine and launch the submarine's warheads
Start menu contains an option called "Demo Cheats." Likely dev only for E3.
Intel is back
It now takes much longer to draw your weapon after knifing an enemy
Hellfire/Predator missiles return under the name Reaper

Modern Warfare 3 shown at E3