Suspected militant Abu Musab al-Zarqawi has purportedly written to Osama Bin Laden to admit his fighters face a struggle against US forces in Iraq. The letter published on the website of a radical Islamist group in Iraq, Ansar al-Islam, says the grip is tightening “on the holy warriors’ necks”. It was not possible to check the statement’s authenticity. Zarqawi is the prime suspect in many attacks around the world, including the beheading of an American in Iraq. Full Story