Kenyatta

He thanked other leaders, including US President Barack Obama, for their support and used his address to praise the response of the Kenyan people and call for national unity, six months after his election was marked by ethnic tensions.

"Kenya has stared down evil and triumphed," he said.

Many Kenyans agree that the bloodshed has helped foster a greater sense of national unity.

"We are all talking about it. The one good thing is that the whole of Kenya has become one, except for al Shabaab," said Vipool Shah, who helped pull bodies out of the mall.

Kenyatta's focus on Kenya's troubles, and of his role in a global campaign against terrorism, was a reminder that he faces trial at The Hague in a few weeks time for crimes against humanity over violence that followed a 2007 election. The International Criminal Court adjourned the trial of his vice president this week because of the Westgate attack.

Kenyatta and his government have urged the ICC to drop the case and warm words for the Kenyan leadership from Western allies during the siege may have boosted their hopes that the court might be pressed to shelve proceedings in the interests of shoring up an important partner in the fight against al Qaeda.

The Nairobi attack came at a time when several violent Islamist groups from Mali to Algeria and Nigeria to Kenya have tapped into local grievances. But all have espoused an anti-Western, anti-Christian creed and are striking at state authority and international interests.