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Security for US President Barack Obama's first state visit to the United Kingdom has been beefed up following Osama bin Laden's death.

"Though bin Laden is dead, al-Qaida is not. The terrorists almost certainly will attempt to avenge him and we must, and will, remain vigilant and resolute," said CIA Director Leon Panetta.

British police carried out a controlled explosion to destroy a suspicious bag in a central London street last week, although it later turned out to be harmless. A central London avenue near Buckingham Palace was also closed in a security alert last week.

During the two-day visit to London, Obama and his wife Michelle will travel in an armored limousine and helicopters and will be trailed at all times by hundreds of US secret service staff.

Called "The Beast", the limo can be turned into a panic room and resist bullets, chemical weapons and even a missile strike. It also comes with a teargas cannon, night-vision camera and oxygen tanks.

The US president's White House medical unit will be on standby, as well as a supply of his AB-type blood for emergency transfusions. Obama's visit comes as he is waging three wars in Afghanistan, Iraq and Libya.

There will be anti-war protests on Tuesday in London, called by Stop the War, the Campaign for Nuclear Disarmament, Palestine Solidarity Campaign and Justice for Bahrain.

In just two years, the Obama administration has attacked six countries, two more than George W. Bush, Stop the War said, adding that Obama is spending more on the US military than any president in history.

Questions:

1. Who warned “bin Laden is dead but Al-Qaida is not” ?

2. How many days will the Obama’s be in London?

3. What is the US President’s blood type?

Answers:

1. CIA Director Leon Panetta.

2. Two days.

3. AB-type blood.

（中国日报网英语点津 Helen 编辑）

About the broadcaster:

Lee Hannon is Chief Editor at China Daily with 15-years experience in print and broadcast journalism. Born in England, Lee has traveled extensively around the world as a journalist including four years as a senior editor in Los Angeles. He now lives in Beijing and is happy to move to China and join the China Daily team.