>> Soldiers on British streets, the deployment ordered after Monday's terror attack on a concert in Manchester that left 22 dead. Ministers raising the country's official threat status to critical in response, that's the highest level and indicates that another attack could be imminent. Nearly 1,000 troops have already been deployed to key locations, the total number could hit 3,800.
Reuters correspondent Liz Piper in Westminster is tracking where they might appear.>> Since Theresa May announced that the threat level is now critical, security has been stepped up at most major venues in London and Manchester and in other cities around Britain. In Parliament, behind us, we've seen the main gate being closed, only pass holders are allowed to enter, all trips, visits, business meetings have been canceled.
The army has been sent to Downing Street and Buckingham Palace, and a source in the police in Manchester said last night a huge amount of troops arrived at the airport, and some of the airport stores are being used to hold their arms.>> Meanwhile, silence in Manchester. The morning after, thousands gathered to remember the victims, while London is a fortress, police here say they are stretched thin by years of cuts, a picture reflected across the country in Britain's biggest cities.
>> I think the irony is for some people in the police is that Theresa May was the home secretary that brought in these cuts. And now she's promising the police and security services all the resources they need to combat this kind of terrorism. You can't predict where these attacks are gonna happen, but it has been seen that London has become fortress London.
Most of the security has been sent here, maybe, possibly, leaving places like Manchester, Birmingham, a little bit under threat.>> Two days after the UK's worst terror attack in 12 years, this looks like a country gearing up for a battle.