I think that was just the second stage, the third stage and payload (might be a single unit) would have gone a bit farther. Maybe it landed in one of the Midway Islands lagoons, or Kwajalein Atoll where many of our shots out of Vandenberg impact. Like this one.
Count 'em little Kim, all from a single Missile.. which can actually carry more than shown....(although one I we've taken out of service, the last one in 2005, in observance of a never ratified treaty, even though it's the newest land based one we have. The remaining Minuteman III missiles date to the late '60s and early '70s. )