It happened to me today. For a lot of my nuke classes, we use government databases for tabulated information on neutron and photon cross sections. The websites that host these databases have all been shutdown. This means that I actually had to physically track down an ancient thing called a "book" to do my homework today. It didn't even give links to the studies/methodologies that were used to get the data.
Mark my words; someone is going to pay for this.
-
It affected me on October 1st because I am in the military. All of the civilians got furloughed, and then over the weekend the Department of Defense was like, "oh wait.... even with a government shutdown we can still afford to pay our civilian employees...." So they all came back to work yesterday.