47-year-old Obama has taken on the most important job in the world that is to save the global economy from meltdown -- but it is also the most dangerous, and he knows that there are extremists who want him dead, the 'Daily Star' reported.

White supremacists have vowed to kill him and the CIA bosses are taking no chances by throwing a ring of steel around his inauguration. In fact, they have turned Washington DC into an impenetrable fortress for the historic ceremony.

The US capital is being guarded by 45,000 soldiers, police, secret agents and National Guards -- all there to make sure that he does not meet the same fate as assassinated 1960s president John F Kennedy.

Jet fighters will also be on standby for the ceremony.

Obama will be shielded behind bullet-proof glass and ride in a bomb-proof limo with the Ku Klux Klan, neo-Nazis and al-Qaida all gunning for him, according to the news report.

In fact, US military leaders have also tried to cater for every possible type of terror strike from a sniper to a chemical attack.

Intelligence chiefs have reported a huge increase in threats running up to inauguration day. And they have placed snipers on every rooftop around Washington's Lincoln Memorial and Capitol Hill, where Obama delivers his first speech as US President.