Illigal Mexican Immigrants

Recently, I read an editorial about Illigal Mexican immigrants crossing the border to U.S. in the newspaper and I would like to talk about it here. United State is facing a serious problem of illigal immigrants from Mexico. These people are serving as a economic power in the states because they can be hired in low wages. On the other hand, these illegitimate immigrants are getting education and social welfare without paying tax, so many Americans are concerned with it. In the mid-90's, some cities like San Diego started to create fences strengthened securities near America-Mexico border. However, after setting securities, the number of immigrants had doubled by the year 2000. The editor said that illigal immigrants are invading through certain places where security is weak, since the border is as long as the length of Japan Island. Also, before setting securities at the border, immigrants were able to go back to Mexico and come to United States easily. But after placing guards, they decided to stay in the U.S. because it will be difficult to cross the border again. I think this problem is very difficult to solve. If U.S. is going to strengthen the border more, the country needs more money to do so. If U.S. stops to guard the border, will the number of immigrants decrease? I don't think so. Also, there's high posibility of terrorist attacks if the border is unsecured. What do you think U.S. should choose to do?