Reclusive Akhundzada addresses his 'brave soldiers and disciples' at Kandahar madrassa; no photos or video of event, but audio recording shared on social media

Helicopter flying Islamists' flag buzzes convoy of captured Humvees parading through movement's heartland in Khandar province of Afghanistan

Militants are not known to have pilots or technical personnel needed to fly aircraft; Russian choppers also seen in footage; not clear if any of the helicopters are airworthy

US and Britain deploying thousands of troops to evacuate their citizens from capital as insurgents conquer more and more cities

After group captures 7 of 34 provincial capitals, US envoy Zalmay Khalilzad tells insurgents a military takeover of Kabul would guarantee international isolation