The USS New York. 
The 6th USS New York is being built (LPD-21,
an amphibious assault ship) with steel from the Trade Center. (LPD is "landing platform dock).
Image is the USS San Antonio (LPD-17)
Now for the bad news: Super-Cavitation Torpedoes. 250 mph and 27-feet long, these Russian-designed nasties could change naval warfare. And Iran has some. Info at American Spectator.
Update: (Thanks, reader) This torpedo's bark may be worse than its bite. Strategy Pages.