This building is surrounded by firewalls.

He believes that resorting to violence is never acceptable.

He emphasized the importance of national defense.

His rule turned into tyranny.

He took a big risk to start a new business.

We need to strengthen our defensive preparations against military threats.

We installed a new security system to fortify our home.

We are engaged in trade between Japan and China.

He is wishing for peace.

The dog was brutal, and I was scared to approach it.