Eclipse-watchers: looking at 99.9% totality is unsafe!

Safety tips:

• Only use special eclipse glasses; regular sunglasses aren't safe
• Wait for 100% totality before taking off your eclipse glasses. (If you don't have eclipse glasses, wait for totality before looking at all)
• Have a timer prepared on your phone set to the duration of the eclipse at your location, so you know when to put your glasses back on.
• When the sun is mostly (but not fully) eclipsed, it will likely not feel painful to look at it, but it will still damage your eyes permanently.