PARIS (Reuters) -Air France-KLM on Tuesday unveiled a 2.256-billion-euro ($2.41 billion) rights issue to existing shareholders to strengthen its balance sheet and further repay French state aid. The French and Dutch states plan to participate in the capital increase but China Eastern Airlines and Delta Air Lines will sell part of their rights to shipping firm CMA CGM, which will become a shareholder under plans announced last week. Air France-KLM also confirmed its objective of reducing the ratio of net debt to earnings before interest, tax, depreciation and amortisation (EBITDA) to around 2.0…