Until late October, the accepted explanation about the Sep. 6 Israeli airstrike in Syria, constructed in a series of press leaks from U.S. officials, was that it was prompted by dramatic satellite intelligence that Syria was building a nuclear facility with help from North Korea.

But new satellite evidence has discredited that narrative, suggesting a more plausible explanation for the strike: that it was a calculated effort by Israel and the United States to convince Iran that its nuclear facilities could be attacked as well.