Condensation Trail

It was cold this morning, at least for us: 13. C (55.F). An absolutely clear sky, except for this condensation trail.
Three World Champions are out of this Cup: meanwhile, there are still four: Argentina, France, Germany and... Brazil!!! There is a lot of expectation here about the match Germany x USA. Both teams have german coaches who are friends and maybe will "arrange" the result to harm Portugal or Ghana, we hope this won't happen...