Seagull, Big Ben clock, heavy fog, on a foggy day, in central London. 海鷗, 大本钟/ 大笨鐘, 大霧, 大霧天, 倫敦市中心

A seagull flies past the Big Ben clock on a foggy day in central London, November 2, 2015. Airports across Britain suffered disruption on Monday as heavy fog led to delays and cancellations for a second day. Flights to and from London airports were being affected, while foggy conditions in the capital and across Europe were causing problems to airports around the country. (REUTERS/Stefan Wermuth)
Photos of the day - November 2, 2015
http://news.yahoo.com/photos/photos-of-the-day-november-2-2015-1446482151-slideshow/seagull-flies-past-big-ben-clock-foggy-day-photo-105432495.html

A seagull passes by as the sun sets beside Big Ben's clock tower, in London, England on Oct. 12, 2015. (AP Photo/Frank Augstein)
Photos of the day - October 12, 2015
http://news.yahoo.com/photos/photos-of-the-day-october-12-2015-slideshow/photos-of-the-day-october-12-2015-photo-1444680894536.html

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