San Francisco – Matteo Renzi’s journey across the United States continues. Today the Prime Minister is in San Francisco to meet with more than Italian 150 start-ups and entrepreneurs in the high-tech sector. He later plans to visit the Twitter headquarters and meet with the CEO, Dick Costolo. The Prime Minister will also visit the International Italian School of San Francisco to meet with students and teachers. He will then head to Yahoo! for a meeting with the CEO, Marissa Mayer. (9colonne)