Troops Face News Today

British prime ministers house at 10 downing street. nic, give us the latest about what you know in that offensive at this hour. >> reporter: well, there are a number of british troops involved in that offensive. possibly as many as 1,000 along with canadian and u.s. marines and afghan forces, as many as 1,500 afghan troops. the operation has already run into fire fights, troop landing from helicopters, taking up positions as our reporting, exchanges of gunfire, rocket-propelled grenades fired at...