A hot air balloon flies above the city of Geneva April 10, 2011. Thirty balloons took part in the 5th Montgolfiades balloon festival which takes place from April 8 to 10. The balloons took off in various parks in the city center and landed in the nearby countryside. [Photo/Agencies]

Spectators gather around hot air balloons before their take off in the Parc Bertrand in Geneva April 10, 2011. Thirty balloons took part in the 5th Montgolfiades balloon festival which takes place from April 8 to 10. The balloons took off in various parks in the city center and landed in the nearby countryside. [Photo/Agencies]