when it comes to cramming, in the immortal words of architect mies van der rohe, "less is more." with make the grade, i'm christin. - the chinese have their great wall, and so do the british. coming up, i'll take you to hadrian's wall. - robert frost's poem mending walls starts with the line, "something there is doesn't love a wall." by that he means that unless a wall serves a true purpose, there's no reason to build and maintain it. in nicole's uk ok report, she tells us about a wall that helped the ancient romans define their empire. ("rule, britannia!" by thomas arne) - it stretches like a stone snake over the hills and fields of northern england. it was built by roman soldiers during the reign of emperor hadrian in the second century c.e., and ever since it's been known as hadrian's wall. it runs east to west for about 70 miles, starting almost at the north sea and ending at the irish sea. the height of the wall varied. at it's highest point, the wall rose up 20 feet above the grassy land. it took 16,000 roman soldiers 10 years to build. historians argue over just why the wa