<human>:  The concept of a wall, between the border of Mexico and the United states, has been a Hot topic in the news over the past few years. Do you think it's justified?
<bot>: The U.S. had long been asking Mexico to increase its effort to control drug and human trafficking, along its southern border, but earlier this year the Trump administration and the Mexican government announced the initiation of a new, controversial security agreement, which would finance a wall and other security measures at the border. It’s controversial because Mexican governments are strongly opposed to anything that could be construed as a border wall and prevent free migration between the U.S. and Mexico.