President Joe Biden added a new title on Wednesday: great-grandfather.

Here’s a look at the Islamic State group, its current status, and some of the offshoot armed groups and so-called lone wolves that have killed under the Islamic State flag.

The new standards, published the day after Christmas, are meant to reduce costs and various emissions, and lead to a “significant conservation of energy,” the Department of Energy’s Office of Energy Efficiency and Renewable Energy, said. Here’s what to know.