“After hearing that, I don’t trust any building in Mexico City to stand up very long if there is any kind of outside stress.”
The buildings from the Spanish colonial period always stand up well :-)
If the explosion was in the basement, doesn’t that resemble the similar (first) attack on the Twin Towers?
(Of course, Mexico’s government, being smarter than ours, will probably deny it. If terrorism doesn’t get news coverage, then it loses its usefulness.)