'Frustrated' U.N. Syria envoy says wake-up call needed on aid access

By John Irish GENEVA (Reuters) - The U.N. envoy for Syria said on Thursday he was frustrated that there was little improvement in aid deliveries to besieged areas, saying it was a "wake-up call" that had to be heeded. The United Nations, which is mediating peace talks in Geneva, has been banking on an improvement in the humanitarian situation across Syria after a partial truce brokered by Russia and the United States in late February. "(There is) disappointment, frustration indeed, particularly