Why was Taiwan’s president evacuated in a military drill overnight?

President William Lai took part in an emergency evacuation drill as part of Taiwan military exercises preparing for a potential Chinese invasion.

Why was Taiwan’s president evacuated in the middle of the night?

President William Lai took part in an emergency evacuation drill as part of Taiwan's annual Han Kuang military exercises that are running from August 5th to 14th.

The BBC’s Katy Watson explains what happened and why Taiwan is using the drills to prepare for a potential Chinese invasion.