A Brazilian Navy A-4 crashed after a mid-air collision with another A-4 while both were practicing on air patrol duties for the upcoming Olympic Games.
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By Rob Schleiffert (AF-1 Falcao (A-4 Skyhawk)) [CC BY-SA 2.0], via Wikimedia Commons
One pilot ejected before his jet went into the sea while the other damaged A-4 managed to recover back to base.