  The first interstellar meteor larger than dust was detected by US government
sensors in 2014, identified as an interstellar object candidate in 2019, and
confirmed by the Department of Defense in 2022. Here, we describe an additional
interstellar object candidate in the CNEOS fireball catalog, and compare the
implied material strength of the two objects, referred to here as IM1 and IM2,
respectively. IM1 and IM2 are ranked 1 and 3 in terms of material strength out
of all 273 fireballs in the CNEOS catalog. Fitting a log-normal distribution to
material strengths of objects in the CNEOS catalog, IM1 and IM2 are outliers at
the levels of $3.5 \sigma$ and $2.6 \sigma$, respectively. The random sampling
and Gaussian probabilities, respectively, of picking two objects with such high
material strength from the CNEOS catalog, are $\sim 10^{-4}$ and $\sim
10^{-6}$. If IM2 is confirmed, this implies that interstellar meteors come from
a population with material strength characteristically higher than meteors
originating from within the solar system. Additionally, we find that if the two
objects are representative of a background population on random trajectories,
their combined detections imply that $\sim 40\%$ of all refractory elements are
locked in meter-scale interstellar objects. Such a high abundance seemingly
defies a planetary system origin.
