Reuters: Choking smoke from forest fires hung over parts of Indonesia’s Sumatra island on Friday, forcing a delay in flights, and prompting fears that conditions could worsen because of lack of rain, officials said. About 450 hot spots have been detected across Indonesia, and forestry officials have warned that the number could exceed last year’s total of 35,000 as the dry season this year is likely to be marked by less rain than usual. “This morning two planes were delayed for half an …