> A suicide bombing has hit Kabul's diplomatic quarter near NATO's headquarters in Afghanistan. The bomber killed at least one person and wounded several others, the latest in a series of attacks that have killed hundreds in the city since January. It also came the same day that 18 Afghan soldiers were killed in a separate Taliban attack on a remote army post.
Kabul's been on high alert since a January bombing that killed over 100 people. And violence in the country has surged since the United States took a more aggressive change in strategy there last August. Islamic state's Afghan affiliate has become more active, too, claiming several recent attacks. Afghanistan's president has approved a new security plan for Kabul.
But it's not clear what further steps can actually be taken to protect the city of 5 million. It already has numerous checkpoints and vehicle restrictions.