Reminds me of bombing footage back in 1991 of an Iraqi truck driving through the crosshairs of an U.S. warplane moments before a bomb blew up a bridge. I remember the Pentagon/CENTCOM briefer showing the video and saying; "right through the crosshairs ... and in his rearview mirror ..."
Accordint to Fox radio, the White House has definately stated a causus belli. It accuses Hezbollah of violating the territorial integrity of Lebanon and says they are sponsored by Syria and Iran.