Word of the opening of Iran's blocked social media sites was spread, of course, by social media itself: in celebratory tweets and breathless Facebook posts. Hours later, the same sites Tuesday chewed over the sobering reality that the four-year-old firewalls were back in place.
Iran's Internet overseers blamed a "technical" glitch on the brief window to the Web.
But others interpreted the seesaw events as signs of growing internal struggles between the moderate-leaning President Hasan Rouhani — who has promised to ease Iran's cyber-censorship — and hard-liners in the Islamic establishment who see no benefit in lifting restrictions intended to foil potential political opponents and reformists.
Reporting by Brian Murphy and Nasser Karimi, Associated Press.