[SCR1]

I don't believe the 'Twin Tower' Zion plants are functioning anymore, but newspapers on the web report a significant amount of spent fuel there. It is also right on the Lake Michigan lakefront.

[JustPiper]

Easy access, being it is miles from the no fly zone downtown

Also today I was 5 min from O'Hare and looking at all the tall buildings and it made me think many poster's say it would be hard pressed for a plane to hit low building's...these building are maybe 20 stories high near O'Hare and much taller than the Pentagon is, or The White House