By striking the best-defended Iraqis, ministers and the green zone in the centre of Baghdad, the insurgents may be sending a message that they are able to restart more general fighting.

• 通过袭击位于巴格达市中心受到最严密保护的市民，政府部长和绿区，叛乱分子也许在传递一个信息，那就是他们能够重新发起更广泛的战斗。）