morning is break nugs. defense secretary leon panetta arrives in afghanistan unannounced. brand new video of the defense secretary s arrival. he stopped in afghanistan for a real-timeup date from nato top commanders on how prepared allied troops and afghan security forces are to confront the taliban as they gear up for the summer fighting season. just yesterday, a twin suicide bombing in a market near kandahar killed 22 people. 50 other people were injured. nato is under scrutiny after an air strike killed 18 people. that number includes women and children, who were believed to be civilians. the u.s. is also saying that one of its armed helicopters was shot down by enemy fire and killed two crew members on board. let s get right to cnn s mohammed jamjoom in kabul for us this morning. reporter: good morning, soledad. surprise visit by secretary of defense leon panetta was his fourth to afghanistan. he met with u.s. troops and u.s. officials. he acknowledged the uptick in vio