British counter-terrorism agencies have warned that Britain would feel the long-term consequences of the conflicts in Syria and Iraq. The Metropolitan Police and MI6 warn that young British Muslims are travelling to fight in the regions and would return as battle-hardened extremists.
Richard Barrett, a former head of counter-terrorism at MI6 estimates that "possibly up to 300 people have come back to the U.K." and that intelligence agencies would find it impossible to track them.
Nasser Muthana, a 20-year-old man from Cardiff, has appeared in a recruitment video for Isis urging British muslims to join insurgents in Syria and Iraq.
U.S. Secretary of State John Kerry has arrived in Baghdad to meet with Iraq's Prime Minister as well as Sunni and Kurdish leaders. His aim is to dilute the Sunni insurgency and prevent civil war in the troubled country.