听力原文： Flight attendants with Mexico's main airline, Aeromexico, have gone on strike to demand higher wages. The work stoppage, which took effect early Friday, is expected to affect up to 30,000 passengers. Officials with Aeromexico say they are working to put their passengers on other airline's flights to avoid delays. But the strike has already triggered long lines and confusion at Benito Juarez International Airport in Mexico City. The 1,500 striking flight attendants are demanding a pay raise of at least 15 percent. Aeromexico says it is only willing to give a raise of 8.5 percent. The Mexican government has not intervened in the strike. But it has the prerogative to do so ff it considers the airline to be vital to the nation's economy. How many passengers will be affected by the strike?