if the United States had used full conventional power.
( ( if ( ( the ( United States ) ) ( had ( used ( full ( conventional power ) ) ) ) ) ) . )
(ROOT (FRAG (SBAR (IN if) (S (NP (DT the) (NNP United) (NNPS States)) (VP (VBD had) (VP (VBN used) (NP (JJ full) (JJ conventional) (NN power)))))) (. .)))
If the United States had maximized their potential.
( ( If ( ( the ( United States ) ) ( had ( maximized ( their potential ) ) ) ) ) . )
(ROOT (FRAG (SBAR (IN If) (S (NP (DT the) (NNP United) (NNPS States)) (VP (VBD had) (VP (VBN maximized) (NP (PRP$ their) (NN potential)))))) (. .)))