It¡¯s been half a century since the Vietnam War, when journalists had almost unrestricted access to the battlefield.

In the years since the fall of Saigon ended that first conflict of the television age, restrictions on press freedom have grown.

Now, with the U.S.-Israeli war on Iran ¡ª the first major military engagement with American involvement of the social-media era ¡ª the world is facing an information black box.