There were several classified shuttle missions. In those missions their link capacity was severely degraded and had to run through encrypted military rather th

There were several classified shuttle missions. In those missions their link capacity was severely degraded and had to run through encrypted military rather than open NASA civilian channels. This became an issue on STS-27 where they were unable to inspect tile damage with high resolution imaging because of these limitations. The astronauts on this mission were not at all pleased with the situation, and they had good reason not to be, as an entire tile had become dislodged by foam during the ascent.