  A critical review of the evidence for the interstellar origin for the USG
20140108 fireball is presented. Examining USG fireball velocities where
independent data are available shows the former to have significant (10-15
km/s) uncertainties at large speeds and highly variable radiant accuracy, with
average errors in excess of ten degrees. Ablation model fits to the observed
lightcurve are possible for normal chondritic impactors only assuming low
speeds. To match the high speed and low fragmentation height of the USG
20140108 fireball would require a high density/strength object with low drag
and highly aerodynamic shape not made of iron. We suggest the simpliest
explanation for the unusual characteristics of USG 20140108 is that the speed,
in particular, is substantially overestimated.
