Israeli sailors on Sunday intercepted the first of four boats in a so-called "Freedom Flotilla" as pro-Palestinian activists attempted to challenge Israel's blockade of the Gaza strip — but not before Israel sent the activists a mocking letter, NBC News reported. Israeli Defense Forces boarded the ship, which was carrying former Tunisian President Moncef Marzouki and 17 others — out of about 50 activists — attempting to sail to Gaza. Before the confrontation, the office of Israeli Prime Minister Benjamin Netanyahu sent a letter mocking the activists, telling the flotilla, "You seem to have gotten lost."