What is the second tallest mountain in the world?

Up until 1998 the tallest building status was essentially uncontested. Counting buildings as structures with floors throughout, and with antennas excluded, the Sears Tower in Chicago was considered the tallest. When the Petronas Twin Towers in Kuala Lumpur, Malaysia were built, controversy arose since the "spire" extended nine meters higher than the roof of the Sears Tower. Excluding the spire, the Petronas Towers are not taller than the Sears Tower. At their convention in Chicago, the Council on Tall Buildings and Urban Habitat reduced the Sears Tower from "world's tallest" and pronounced it not "second tallest", but "third", and pronounced Petronas as "world's tallest." This action caused a considerable amount of controversy, so, (CTBUH) defined four categories in which the "world's tallest building" can be measured: