One could guess it to be, yes.
how much toxic chinese pet food...toys and other items have they sold...
"Walmart Discount Stores are discount department stores with sizes varying from 51,000 to 224,000 square feet (4,738.1 to 20,810.3 m2), with the average store covering about 102,000 square feet (9,476.1 m2).[10]"
That's a whole lotta space for doing who-knows-what for six months. Hiding in plain site. The trucks go in, the trucks go out... oh it's just Wal-Mart, "moving things around".
Come to think of it, reminds me of those Stormtrooper trucks.