Building walls mentality will only lead to confrontation

Although it is said to be beyond the Pentagon's technical and scientific capacity, which is what grounded most of Reagan administration's "Star Wars" initiative, some people might ask what it is wrong with US President Donald Trump talking about building an impenetrable missile shield to defend all US territory from ballistic missile threats.

But such an anti-ballistic missile defense system can be compared to a wall in outer space, and is yet another manifestation of the philosophy behind all the policies his administration has put forward and implemented on all fronts - hunkering down behind walls.

When it comes to trade with other countries, even with its allies, his administration has built a wall of tariffs as a barrier to prevent imports from other countries. And he insists on building a wall on the border with Mexico.