But the force field couldn't be the only security measure in use.
He said the group would meet next week to consider other security measures.
They changed their lives when new security measures were added.
But increased security measures have been in place here for several days.
To address some of these problems, several security measures should be taken.
We must therefore do more than simply put security measures in place.
The high cost of this building is due to the security measures.
"We are certainly still working hard on the question of whether additional security measures should be taken," he said.
So this is one thing, I think it's the single most important security measure that can be taken.
One positive result of the 2010 conference will be key security measures.