NORFOLK, Va. -- Baptist chaplain Fred Holcombe Jr. pastors a flock numbering 3,500 to 5,800 people -- the population of a small town. But this “town” is more than 18 stories high, 1,123 feet long and takes up 4 1/2 acres. When fully loaded it weighs 95,000 tons -- yet it floats. It is the...