Not exactly.
Solo flight with a nuke is NOT allowed. Ever.
And nukes, if they are being transferred, are to be shipped internally on a lifter, not strapped to an external hard-point.
True enough that those are the rules, but six warheads were inadvertantly strapped under the wings of a B-52 and flown solo from Minot to Barksdale in 2007 due to criminal neglect.