Even though I was just diagnosed with lung cancer and treatment won't begin for another couple of weeks, I have read enough to know that 4 years is definitely a milestone, so I join the others in saying, "Congratulations!" As a totally irrelevant side note, I live in DC now, but lived in Lewisville, Tx for 12 years. Miss it, too. Anyway, may God bless you with another 4. And then another.........