The 4.2 inch mortars in the infantry units were incapable of
penetrating the reinforced concrete, and the 75 or 76mm guns on the
tanks and tank destroyers experienced similar problems.
The former Legislature Building is now the Manila Museum, and you can go
in, sign the visitors book, and walk through the various galleries. Unfortunately, due to
decades of chronic underfunding and political disinterest, it's a sad place which doesn't
reflect the enthusiasm and creativity of its staff members.