A group of climate activists crossing the Atlantic by sailboat to a UN summit in Chile were shocked to learn the event was canceled -- four weeks into their grueling voyage. The 36 young environmentalists set off from Amsterdam on October 2, using a sailboat in order to highlight the impact of flying on greenhouse gas emissions. They had completed more than half of their seven-week journey to the UN Climate Conference (COP25) in Santiago, Chile, which was scheduled to take place in early December. However Chile's President Sebastián Piñera announced Wednesday that the country would no longer host the...