Labor Day Fireworks?

Are the Norks about to put on an encore fireworks extravaganza for the US?:

South Korean and the U.S. intelligence authorities have detected suspicious vehicle movements in and out of North Korea’s major missile test site, a government source here said Sunday.

“Military intelligence officials have spotted movements by several large vehicles in the North’s Gitdaeryeong area,” the source spoke on condition of anonymity. “They don’t rule out the possibility that it is part of preparations for additional missile tests.”
North Korea test-launched six short-and medium-range missiles from the Gitdaeryeong site in its eastern coastal area, on July 5, along with a long-range Taepodong-2 missile from separate facilities.