With the clock ticking for world leaders to clinch a climate deal in Copenhagen, the last place you want to be is stuck at the back of a long queue.
But for thousands of delegates meeting in the Danish capital, that is exactly where they have spent endless hours this week.
They stood in the cold, braving the odd snow flurry, for hour after hour, waiting to be allowed into the conference centre on the edge of town where 193 countries are trying to thrash out a new deal on climate change.
Organisers said more than 45,000 people descended on a venue with a capacity for about 15,000.
Processing all those delegates, journalists and members of environmental groups took much longer than expected.