Depening upon who is the US president
"The Uranian equinox opportunity that NH II can achieve in 2014 will not reoccur until almost 2050. It is no exaggeration to say that the timing of the NH II Uranus-KBO exploration combination is literally once in a lifetime."
Hopefully, unlikely as it may be, a new president will not again demonstrate massive ignorance and fear by pandering to the anti-nuke crowd and voting to ahem, "postpone" this launch. After all, Uranus will still be there in the 2050s, right?
-p