What was interesting in this episode was the revelation on what happened to the other cities--aside from San Diego to the south, other coastal cities to the north like Seattle, Washington and Portland, Oregon and even Vancouver, Canada were similarly bombed by the military; in fact, the areas to the west of the Continental Divide have all fallen.
Also intriguing was Victor's hidden map that Daniel found--seems he was originally headed for Mexico, which sealed its border with the USA when the outbreak hit.