  We derive a new Fibonacci identity. This single identity subsumes important
known identities such as those of Catalan, Ruggles, Halton and others, as well
as standard general identities found in the books by Vajda, Koshy and others.
We also derive several binomial and ordinary summation identities arising from
this identity; in particular we obtain a generalization of Halton's general
Fibonacci identity.
