'This sky-writing smiley face hung in the air for several minutes before dissipating. Applications for sky-writing in Ghana are many, and appear to have great potential. Beyond the smiley face and 'marry me' smoke signals that are popular in the USA, there is potential to explore 'flood warnings' and other alert systems using coloured smoke in areas where communications and literacy are a challenge. This image is 100% original and shows the cloud image produced by a light aircraft flying with a smoke system, taking about four minutes to execute. Have a smile filled week and remember that the sky's the limit for those with imagination! Photo taken at Oshkosh Air Venture 2011.