Delta wants at least 3,000 flight attendants to take unpaid leave

Atlanta-based Delta last month reported a 91% plunge in second-quarter revenue and a $3.9 billion (3 billion pounds) adjusted pre-tax loss.Delta would need at least 3,000 of its roughly 20,000 flight attendants to take unpaid leave of up to 12 months, among other options outlined in a memo reported earlier by CNBC.A person with direct knowledge of the matter confirmed the contents of the memo to Reuters.