21. After the'96 World Series, Henry had an existing eight-foot wall extended around the house. 22. The Red River crested Friday without spilling over the city's 40-foot wall of sandbags. 23. But because of a 15-foot wall atop the building, it is eerily quiet there. 24. A 16-foot wall will represent the German bunkers that guarded the cliffs of Normandy. 25. It is surrounded by a 4-foot wall that functions more as decoration than protection. 26. The toughest day was when I had to climb a 400-foot wall of ice, 27. Al-Hamra compound, which suffered one of the worst attacks, was hidden behind 20-foot walls . 28. It is surrounded by a close-in 4-foot wall that is more decorative than protective. 29. They must then rappel down a 50-foot wall ( back-first, with rope harness ). 30. The drug market behind Graterford's 30-foot wall mirrors the city's.