Brian, yes Mrs T did shed a tear when she left no10 for the last time.
There is one other time when she is reported to have shed tears while in office. That was while she was writing handwritten letters to the bereaved of the Falklands War. No-one could accuse her of being weak as a result.
That is a very different thing to crying because you might lose a Commons vote on a new airport....using tears as a weapon to get your 'supporters' to vote for you - pathetic.
Here is Guidos take on it, in his usual style....
http://www.order-order.com/2009/01/tears-of-brown.html
Note the bit at the end about Gordon wetting himself!