When was the last time live doves were released during the opening ceremony of a Summer Olympic Games?

Question

What was the stated motive behind a bombing in Centennial Park during the 1996 Summer Olympic Games in Atlanta, Georgia, USA?

Answer 1

1992
At the previous Olympics in 1988 doves were injured or burnt alive when the cauldron was lighted; in 1992 live doves were again released but hours before the cauldron was lit, but in subsequent Olympics the practice was abandoned in favour of releasing symbolic "doves".