From the BBC:

Al-Jazeera editor leaves for BBC
The Arabic satellite TV channel al-Jazeera says its editor-in-chief has submitted his resignation.
According to an al-Jazeera spokesman, Ibrahim Helal said he had had “a tempting offer” from the BBC.
The charity BBC World Service Trust confirmed that Mr Helal was joining to work on a variety of media training projects over the next two years.
Al-Jazeera has been criticised by the US for airing recorded messages from Saddam Hussein and Osama Bin Laden.