This Sunday marks six years since the U.S. invaded Afghanistan to topple the Taliban and root out al Qaeda. Today, Afghanistan is suffering through its most violent year since 2001, al Qaeda has expanded its reach, and U.S. casualties continue to grow. Tomorrow at 11 am ET, HuffPost will host a live chat with Said T. Jawad, Afghanistan's Ambassador to the United States, who has watched the struggle firsthand. To take part in the discussion, please send your questions, along with your name and town, to firstname.lastname@example.org between now and the start of the chat. Then be sure to check out this space Thursday at 11 am ET for this timely conversation.