Why Did Hillary Clinton Cancel All Public Appearances for Today?

Is it because she's dropping out of the race, or is it just that she doesn't want to have to publicly defend staying in the race after Obama's win in North Carolina?

Tim Russert says it's over.  Barack Obama is the nominee.

However, Clinton has eked out a "razor-thin" victory in Indiana.

Update 1:  Lucianne puts it this way today:  Hillary mortally wounded. How long before she actually falls down?

Update 2:  Check on the guy on the left.  He seems delighted by Hillary's win in Indiana, doesn't he?  (And isn't it beautiful to see the love between the Clintons continue to deepen and grow as time goes by?)