My PhD was awarded in March of 1960, and I stayed the rest of that year doing postdoctoral amplifications of our findings. After a 6-month hiatus, I joined the U.S. Army Biological Laboratories, Fort Detrick, Frederick, Maryland, as a National Academy of Sciences-National Research Council Resident Research Associate. During a year there, I learned the then-accepted procedures for working with highly pathogenic agents; most of these procedures are now obsolete. My own research concerned the kinetics of neutralization of Semliki Forest virus by rabbit antiserum, as measured in primary cultures of chicken embryo fibroblasts. Chicken embryos (9-10 days incubated) to be cultured were received in the shell and were decapitated, minced, and trypsinized more or less as described above. Although plastic cell-culture flasks had become available, their failure rate was so high in those early years that they were not permitted for use at Fort Detrick, for fear of contaminating an entire incubator with leaked virus suspension. Soft-glass prescription bottles continued to be the vessel of choice: at least they were only used once. I was not encouraged to publish my research findings, at least partly because Fort Detrick was a relatively secretive establishment. Meanwhile, the fact that my wife and I were of disparate races had made our life in Frederick unpleasant, and so we determined to move on. Up to this point, I had decided that I would like to continue in virology, not necessarily with veterinary applications.