The faster, more powerful European XFEL free-electron laser[1] was inaugurated on September 1, 2017, near Hamburg, Germany. By producing ultra-bright, trillion-photon X-ray flashes at a frequency two hundred times greater than the best preexisting free-electron lasers (FELs), this next-generation European instrument will allow scientists to map the atomic relief of viruses, decipher the molecular composition of cells, create 3-D images of the nanoworld, and even film chemical reactions.