Simplify the following text for a Grade 13 native English-speaking person.
Original: Fifty-five minutes after the loss of the aircraft , a suitcase checked in by one of the accused perpetrators exploded at Japanâ s Narita Airport , killing two baggage handlers and injuring four other individuals nearby .
Simplified: Around fifty-five minutes later after the loss of the aircraft , a suitcase which was checked in by one of the accused perpetrators in the bombing exploded at Japanâ s Narita Airport and killed two baggage handlers and injured four other people nearby .