national of the United States
shall be fined under this title or imprisoned not more than twenty years, or both. There is jurisdiction over an offense under this subsection if a national of the United States was on board, or would have been on board, the aircraft; an offender is a national of the United States; or an offender is afterwards found in the United States. For purposes of this subsection, the term “national of the United States” has the meaning prescribed in section 101(a)(22) of the Immigration and Nationality Act.
Source
18 USC § 32(b)
Scoping language
For purposes of this subsection