Doug, I will take a shot at that. I think if you look at the range we've given you, we were in the 4% to 6% range which is definitely lower than what we've out looked before. I see a couple things going on there and first let me give you a little bit of color on the individual lines of business that we see there. It might surprise you somewhat to learn that our defense line of business there, we actually expect to have kind of high single-digit growth, within our civil line of business, think of that as kind of the mid single-digit level, and think of our intelligence line of business as being in the low single-digit growth. So it's not a uniform level of growth across the three business areas or across the three lines of business. I'll say we probably, given the experience that we had in 2009 with a number of the protests, a number of the delays, a number of the program start-ups and funding concerns that occurred, we probably recognize that fact, and probably turned that into our outlook for 2010 as well. So for instance, we saw the bigger things that impacted us. The TMOS cancelation was in IS&GS. So while there were some sales activities in 2009, again, as Bob mentioned in his remarks, that burden was terminated, so there is nothing in 2010 for that. A couple of the larger contracts, I mentioned in the second quarter, the [FASTeR] contract, and the fact that that was planned, actually the 2009 start, today it is a 2010 competition, with a date uncertain as to when that will take place. So we have taken what you would probably assume to be the appropriate action resulting from that. Some of our larger contracts, some of the IDIQ contracts approximately we're expecting to have in 2009 have just come into fruition. For instance, the GSA Fame contract and the AFRICAP contract which you may recall in 2008 was a significant contributor to our overall growth levels in 2008. That contract actually was just recently awarded for its 2009 activity, and think of this as being delayed primarily because of the administration changeover. So given that backdrop of what we've seen happened in 2009, I think we've just tried to reflect, you could call it a more conservative view but I will say a more realistic view as to what our expectations are in 2010.