Reopening Kabul's international airport is critical for the Taliban if it's to stand a chance of rebuilding Afghanistan. The fragile security situation poses a big challenge to making the airport fully operational again. Add to that, the need for skilled manpower and new equipment. The airport is the gateway for international aid to reach millions of displaced people, and a lifeline to reviving the economy. But with the first domestic flight taking off less than a week since the Americans left, there's now hope. - Follow us on Twitter: twitter.com/AJEnglish/ - Find us on Facebook: www.facebook.com/aljazeera/ - Check our website: www.aljazeera.com/