U.S. submarine sinks Iranian warship as war spreads in the Middle East

THEIR STORIES WITH YOU. WE HAVE IT COVERED FROM HERE TO THE MIDDLE EAST. RICHARD ENGEL.>> Reporter: THERE HASN'T BEEN A VIDEO LIKE THIS IN DECADES, A PERISCOPE SHOWING THE MASSIVE BLAST AFTER AN AMERICAN SUB DESTROYED AN IRANIAN SHIP. FIRST TIME SINCE WORLD WAR II SINCE THE AMERICAN SHIP DESTROYED A SHIP WITH A TORPEDO. >> WE'RE GOING TO CONTINUE.>> Reporter: AND PENTAGON DESCRIBES IT. >> ONLY THE UNITED STATES OF AMERICA COULD LEAD THIS. ONLY US.BUT WHEN YOU ADD THE ISRAELI DEFENSE FORCES, DEVASTATINGLY CA ...