SQL that returns every record twice

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I have a table that basically holds a start time and an end time for
an event. Now I want to generate a report that returns all events
sorted by time, whether something starts or ends.

Table StartTime EndTime Event
7.00 7.30 A
7.15 8.15 B
8.00 9.30 C

Report Time Event
7.00 A
7.15 B
7.30 A
8.00 C
8.15 B
9.30 C

Can anyone help with the SQL?

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