Rocket.
Here are some SpaceX launch timelapses (one with boosters landing) and timelapse of regular aircraft.
One is point source light. One is great ball o' fire.
Now, if there was missile tomfoolery aboot, gotta ask who and why.
Who could be any numbed of sketchy global actors. Including some domestic.
Why? Is the 64 trillion $ question.
Possible reasons:
1) wreck the Sing conference (obviously)
2) other
Let's focus on 1)
Use the "5 Why's" to get the answer.
First why's:
A) Power
B) Money
C) Freedom (staying out of jail)
D) Revenge
E) Random Evil-doing
Who benefits if the Singapore talks did not happen or go well?
Who made big bets on the world financial markets over the last week or three? <<< I think this could be VERY revealing, but will leave it to financial pros to dig.
People do shit for the same reasons. Only the scale is different.