BBC News with Sue Montgomery

Documents seized from Osama bin Laden's

hideout

a year ago appear to show that the head of al-Qaeda had become frustrated with regional jihadist groups. The documents also show that bin Laden wanted to target President Obama's plane. Here's our security correspondent Gordon Corera.

It is impossible to know how representative these documents are. But as well as showing the desire to kill the president, they provide a series of unique

snapshots

of the concerns of top al-Qaeda officials from 2006 to 2011. If there is one unifying theme, it is frustration - frustration for Osama bin Laden at the actions of groups which had affiliated themselves to al-Qaeda but whose actions could not be controlled, for instance, the way in which al-Qaeda in Iraq killed Muslims undermining support.

The Chinese

dissident

at the centre of a diplomatic standoff between Beijing and Washington has made an unexpected live appeal to the US Congress. Speaking over a telephone line from Beijing, Chen Guangcheng said he wanted to come to the United States to rest. From Washington, Jonny Dymond.

Over a mobile phone from his hospital in Beijing into a congressional hearing in Washington, Chen Guangcheng made his plea for freedom to travel, for a period of rest in the US - rest, he said, he had not had for 10 years. He said he wanted to meet the US Secretary of State Hillary Clinton and to thank her. He said he was worried about the safety of his family and spoke of the security measures that had been put in place to