I just saw this sentence on cnn:
Experts believe if Friday's test would have been fired on a flatter, standard trajectory, it could have threatened cities like Los Angeles, Denver and Chicago.
I expected this:
Experts believe if Friday's test had been fired on a flatter, standard trajectory, it could have threatened cities like Los Angeles, Denver and Chicago.
So what is the difference between these two sentences in terms of meaning and grammar?
Thanks in advance