Overview

• About 20 boats carrying more than 300 participants, including Greta Thunberg and former Barcelona mayor Ada Colau, departed Sunday from Port Vell.
• The convoy turned back to Barcelona the same night because of bad weather, with captains meeting Monday morning to decide whether to restart.
• Backers say the mission seeks to deliver limited humanitarian supplies and to press for a maritime corridor to the enclave.
• Organizers expect additional vessels to join from ports in Italy, Tunisia and Greece in early September to expand the effort.
• Recent attempts to reach Gaza by sea, including the Madleen and Handala this year, were intercepted in international waters, underscoring the high risk of interdiction.