11.   Both are very earthly, which weakens another popular argument -- that the chunks may come from the tail of a comet.

12.   The biggest chunk will come when offices sitting on a hill next to the Pentagon, called the Navy Annex, are torn down.

13.   When the posts were lifted, a chunk of ice came up, leaving the post area in the crease exposed to its concrete base.

14.   When the posts were lifted, a chunk of ice came up, with each leaving the post area in the crease exposed to its concrete base.