The glass dome of Germany's Reichstag parliament building that draws thousands of tourists each day has been closed indefinitely over concerns of a possible terrorist attack.
The shut down came after reports that al Qaeda plans to attack the building at the end of November. Berlin police are now searching for two suspected suicide bombers trained by al Qaeda in Pakistan.
Al Qaeda leaders boasted about the extra security measures being taken after the group's failed plot to blow up cargo planes headed for the United States last month.
In an online terrorist magazine called "Inspire," al Qaeda members in Yemen said by spending just $4,200 on the bomb plot, they've forced the U.S. to spend millions on heightened security.
"For a few hundred dollars on their part and very little effort, they get this enormous reaction from us and that is the basis of asymmetrical guerilla warfare, asymmetrical terrorism," explained ABC news consultant Richard Clark. "A small effort on their part requires a huge effort on our part."
The terrorists called the plot to blow up cargo planes "Operation Hemorrhage."
They measured its success by, "The spread of fear that would cause the West to invest billions of dollars in new security procedures."
The group also promised similar attempts in the future.