Rodricks: Build giant water tanks, land on Mars, keep people from freezing — if we go big, we can do it all

Baltimore now has the largest underground storage tank for drinking water in the whole wide world. That’s according to city officials and engineers who have earned the boast. The massive tank, located in Druid Hill Park, will be tested for leaks next month and, if all goes well, it should be in service to the city’s 1.8 million water customers a year from now. I went out to see it the other day because I wanted to be awed, I needed to be awed. The country has had too many failures. My city has had too many failures. I needed to be reminded of the good and sometimes amazing things we do.