By Cecilia Zyambo:Young African Leaders Initiative-YALI- says it is unfortunate that United Party for National Development-UPND-Leader Hakainde Hichilema is threatening to sale public assets such as the Presidential Jet.YALI President Andrew Nthewewe says Mr. Hichilema must understand that the Presidential Jet is a public asset.Mr. Nthewewe told ZNBC News that Zambians  should be cautious  with…