  During the past several decades a large quantity of high-quality mesonic
photo- and electro- production data have been measured at electromagnetic
facilities worldwide. By contrast, meson-beam data for these same final states
are mostly outdated, largely of poorer quality, or even non-existent,
especially those involving spin asymmetries and polarizations. Thus existing
meson beam results provide inadequate input to interpret, analyze, and exploit
the potential of the new electromagnetic data. To achieve full benefit of these
high-precision electromagnetic data, new high-statistics data from measurements
with meson beams, with good angle and energy coverage for a wide range of
reactions, are critically needed to advance our knowledge in baryon and meson
spectroscopy and other related areas of hadron physics. To address this
situation, new, state-of-the-art meson-beam facilities are needed. This
presentation summarizes unresolved issues in hadron physics and outlines the
opportunities and advances that are possible with such facilities.
