Commercial carriers deserted Don Mueang at the opening of Suvarnabhumi Airport. But the higher operating costs of the new airport and safety concerns over cracked runways at the new airport caused many to seek a return to Don Mueang. Low-cost airlines led demands for a reopening of the airport. Airports of Thailand released a report at the end of 2006 which furthered this effort. The report proposed reopening DMK as a way to avoid or delay second-stage expansion which had been planned for Suvarnabhumi.