The attacks underscored the enormous challenges facing America's renewed peacemaking efforts.
These attacks underscore the ongoing terrorist threat in Indonesia.
Monday's attack underscored the inherent risks in the new strategy.
Suicide car bombings against American soldiers are rare, and the attack underscored the increasing skills of insurgents here.
The attack underscored the vulnerability of United States military personnel here, despite the stringent security measures said to be in force.
In addition, they said, the attacks of Sept. 11 underscored for many the influence of religion on world affairs.
The successful attack has underscored the divisions and growing military vulnerability of the Serbs.
The attack on Sunday underscored the vulnerability of the small, ill-equipped and demoralized force, he said.
"Today's attacks underscore the continuing willingness of those opposed to peace to commit horrible crimes," he said.
Whatever its origins, the attack underscores the need for better criminal and community responses to hate crimes.