Both were successfully recovered, although one appeared to break through its netting, possibly hitting the deck of its ship. William Harwood/CBS NewsTwo-and-a-half minutes after liftoff, the veteran first stage fell away, the single vacuum-rated Merlin engine powering the second stage fired up and the rocket continued its climb to space. Less than a minute after stage separation, the two halves of the rocket's nose cone fairing, both veterans of two earlier missions, fell away for parachute descents to capture netting aboard waiting recovery ships. That flight remains on hold while company engineers assess an apparent issue with engine turbopump machinery. In a recent study, researchers led by Stefano Gallozzi, wrote: 'Depending on their altitude and surface reflectivity, their contribution to the sky brightness is not negligible for professional ground based observations.
Both weresuccessfully recovered, but the experts are unsure of how they facted-and-a-half-piece.
( z0 have-concession :ARG1 ( z1 recover :ARG1 ( z2 both ) :ARG1-of ( z3 succeed ) ) :ARG2 ( z4 sure :ARG0 ( z5 person :ARG1-of ( z6 expert ) ) :ARG1 ( z7 thing :manner-of ( z8 fact :mod ( z9 piece :quant 2.5 ) ) ) :polarity - ) )
(z0 / have-concession-91
    :ARG1 (z1 / recover-01
              :ARG1 (z2 / both)
              :ARG1-of (z3 / succeed-01))
    :ARG2 (z4 / sure-02
              :ARG0 (z5 / person
                        :ARG1-of (z6 / expert-01))
              :ARG1 (z7 / thing
                        :manner-of (z8 / fact
                                       :mod (z9 / piece
                                                :quant 2.5)))
              :polarity -))
Both weresuccessfully recovered , but the experts are unsure of how they facted - and - a - half - piece .
z1 :ARG1-of z3
z1 :ARG1 z2
z0 :ARG1 z1
z5 :ARG1-of z6
z4 :polarity 0
z4 :ARG0 z5
z0 :ARG2 z4
z4 :ARG1 z7
z7 :manner-of z8
z9 :quant 1
z8 :mod z9