Hot. Very Hot day!  had not run in 3 weeks do to new arrival.. baby Caroline.  Oh, and that whole sleep thing is just not happening so i was pretty worn out going in and probably deconditioned.  All in all still the best course I have ever run.  Well planned, plenty of aide stations that are clearly marked.  The fans, 1 million +, who come out to cheer on 45,000 runners are amazing.  Planned on running a sub 4 and was on track at the half way pont but the heat hit me around 16 and I justed could not cool off.  Pete Ripmaster ran with me.  It was his first. he ran well, i think 4:05 ish.