Key Facts

• The NTSB is the U.S. agency responsible for investigating transportation accidents.
• A midair collision refers to when two aircraft crash into each other while flying.
• The collision occurred in January between an Army helicopter and a regional jet from American Airlines.
• The hearing aims to uncover more details about what happened and why.
• The investigation can lead to new safety recommendations to prevent future accidents.
• This is an official hearing, which means it's a formal meeting to collect facts and evidence.