Glass is sturdier than you think. Glass for skyscraper exteriors are rated to be extremely impact resistant in case of birds running into it, not to mention capable of weathering gale force winds. Also, it probably is cheaper to ship from China to New York than from Pennsylvania to New York. Ocean transport costs fractions of what it costs for truck and rail normally and with the decline in the Baltic dry index it’s the next best thing to free.
That’s probably true ... IF the glass were from almost any other country overseas. But from China, it will probably make it here in one piece ... only to probably shatter when the first gust of wind hits it.
Or maybe it will give off some chemical fumes that will make people sick.