He said there were technological solutions to tighten security of classified military networks.

Yes, you need to tighten security in any way you can.

Nets plans to tighten security and step up checks of employees' data logs.

But he said the measures were not the last step to tighten security.

I agree; I can have the police tighten security there, too.

Nigeria's army has issued a nationwide warning to tighten security at the centres.

She also pledged to tighten security on the porous U.S.-Mexico border.

Nigeria's army has issued a nationwide warning to tighten security at the centers.

Trump has said the restrictions are needed to tighten security and prevent terrorist attacks.

Promising compensation might remove an incentive for businesses to tighten security, some executives say.

Charities working there have also been urged to tighten security.

Chinese authorities have also moved to tighten security in Xinjiang.

Officials describe it as a terrorist attack and tighten security.

Trump has argued that the restrictions are necessary to tighten security and prevent terrorist attacks.

But after that incident, Bowen decided to tighten security around his personal details even more.

Earlier this year, U.S. National Guard forces were dispatched to border states to help tighten security.