dr. seth jones is a senior political scientist at the rand corporation. is a well-known expert on afghanistan and the author of the book, in the graveyard of empires, america's war in afghanistan. stephen biddle is a senior fellow for defense policy at the council on foreign relations. an expert in defense policy and strategy. gentlemen, we look forward to your help in addressing many of the questions i have just posed. senator lugar. >> mr. chairman, i join you in welcoming our distinguished witnesses and we look forward to a very important hearing with them. afghanistan has been important and to still be a source of threat to the united states security. on that we are all agreed. the question before us is whether afghanistan is important enough to justify the lives, the massive resources that are being spent their, especially given our nation's debt crisis, or can we achieve the most important national security goals in afghanistan essentially preventing the taliban from taking over the government, and preventing afghan territory from being used as a terrorist safe haven at far less expense? at our first hearing on afghanistan last week, i offered four observations as a prelude. first, we'r