Yup, all EIGHT of them. This is one expensive hobby! (Old news, but still pretty cool)

http://rcuvideos.com/item/L5P9YSGZQ7PLTJ69

Unfortunately it crashed much like the full size B-52 in Fairchild did. There were high winds that day and the aircraft had a tendency to veer left. The pilot admitted it was his fault due to a lapse of judgement and the picked up the pieces and tried again.

The second aircraft was 100 pounds lighter and passed all of its taxi tests. On its first takeoff it crashed when the battery packs shifted inside the airframe. Again the pilot blamed himself for not properly securing the battery packs.

They have been denied a permit to build a third aircraft so all we have are these videos and a series of photos to enjoy.