Kansas officials reacted to the fatal plane crash in D.C., saying the tragedy will "unite those in Washington D.C. and Wichita, Kansas, forever."

All 64 people aboard an American Airlines jet that collided with an Army helicopter were feared dead in what was likely to be the worst U.S. aviation disaster in almost a quarter century, officials said Thursday.

An air collision involving a commercial jet and a military helicopter is believed to have killed 67 people in Washington DC. The recovery operation continues with the cause of the disaster still unknown.