Iowa teens delighted as Greta Thunberg leads unexpected climate strike

More than 3,000 people gathered in the shadow of the University of Iowa on Friday afternoon to hear Thunberg speak

Three days prior to Greta Thunberg's surprise visit to Iowa City on Friday, the organizer and local climate activist, Massimo Biggers, a 14-year-old Iowa City high school student, was preparing to strike - as he has done every Friday, sometimes on his own, since the Global Climate Strike day Thunberg inspired on 15 March.

Out of the blue, a message arrived from the Swedish teen activist, with whom he had been in touch, asking him if he was planning to strike again this Friday. "Of course!" he replied, and for the last 48 hours, according to his father, Jeff, neither had slept. "This was truly a miracle to have the town pull this together," he said.