  The small class of known stars with unusually warm, dusty debris disks is a
key sample to probe in order to understand cascade models and extreme
collisions that likely lead to the final configurations of planetary systems.
Because of its extreme dustiness and small radius, the disk of BD +20 307 has a
short predicted collision time and is therefore an interesting target in which
to look for changes in dust quantity and composition over time. To compare with
previous ground and Spitzer Space Telescope data, SOFIA photometry and
spectroscopy were obtained. The system's 8.8-12.5 $\mu$m infrared emission
increased by $10 \pm 2 \%$ over nine years between the SOFIA and earlier
Spitzer measurements. In addition to an overall increase in infrared excess,
there is a suggestion of a greater increase in flux at shorter wavelengths
(less than 10.6 $\mu$m) compared to longer wavelengths (greater than 10.6
$\mu$m). Steady-state collisional cascade models cannot explain the increase in
BD +20 307's disk flux over such short timescales. A catastrophic collision
between planetary-scale bodies is still the most likely origin for the system's
extreme dust; however, the cause for its recent variation requires further
investigation.
