By 10:45 there was, however, another set of fighters circling Washington that had entirely different rules of engagement.
( ( By 10:45 ) ( there ( ( ( ( ( was , ) however ) , ) ( ( another set ) ( of ( fighters ( circling ( Washington ( that ( had ( ( ( entirely different ) rules ) ( of engagement ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN By) (NP (CD 10:45))) (NP (EX there)) (VP (VBD was) (, ,) (ADVP (RB however)) (, ,) (NP (NP (DT another) (NN set)) (PP (IN of) (NP (NP (NNS fighters)) (VP (VBG circling) (NP (NP (NNP Washington)) (SBAR (WHNP (WDT that)) (S (VP (VBD had) (NP (NP (ADJP (RB entirely) (JJ different)) (NNS rules)) (PP (IN of) (NP (NN engagement))))))))))))) (. .)))
Reports of any fighters in the airspace over Washington on that day are incorrect. 
( ( Reports ( of ( ( any fighters ) ( in ( ( the airspace ) ( over ( Washington ( on ( that day ) ) ) ) ) ) ) ) ) ( ( are incorrect ) . ) )
(ROOT (S (NP (NP (NNS Reports)) (PP (IN of) (NP (NP (DT any) (NNS fighters)) (PP (IN in) (NP (NP (DT the) (NN airspace)) (PP (IN over) (NP (NP (NNP Washington)) (PP (IN on) (NP (DT that) (NN day)))))))))) (VP (VBP are) (ADJP (JJ incorrect))) (. .)))