you. it's just something with you. >> good afternoon. i'm alex witt here at msnbc world headquarters. there we take you to bagram air force base. you see the president just having been introduced there. this was a surprise visit. the president landed about two hours ago. we'll take a listen to him addressing the troops. >> first of all, i want everybody to give a huge round of applause to your commander, general joe dunford. give him an outstanding, rousing, acknowledgement. i am grateful to him for his leadership of our coalition here in afghanistan and for his lifetime of distinguished service to the marine corp. and to america.