15 Questions for Evolutionists -- #9 Why are the (expected) transitional fossils missing?

Question 9 in CMI's '15 Questions for Evolutionists' flyer has plagued evolutionists since the time of Darwin. Where are the transitional fossils? Evolutionary paleontologists have stated that the "missing links" are still missing and some, such as the late Stephen J. Gould, have suggested new ways of interpreting the fossil record due to the lack of transitional fossils.