People gathered in the Northeast Philadelphia neighborhood from dawn to mid-afternoon to see what remained of Friday's nightmare. They stood yards away from a debris field of broken plane pieces and singed cars to get a glimpse of the wreckage.

The National Transportation Safety Board said in a briefing Saturday evening that the U.S. Army Blackhawk helicopter that collided with an American Airlines passenger jet flew higher than FAA restrictions allow,

While authorities focus on the cause of the US's deadliest aviation disaster since 2001, families are mourning their loved ones. Here's the latest.