Williams, 69, was a former Air Force F-101 fighter pilot and served in leadership roles with the Civil Air Patrol with the rank of lieutenant colonel.
Young, 78, had joined the Civil Air Patrol in May 2011. He was a major in CAP.
On the ground, Loretta Jamison was home alone while her husband was at work. Her nephew, Milton Miller, said she was in the bedroom getting some clothes together when the plane crashed. She suffered second-degree burns on her hands.
Jamar Funchess, a 20-year-old student at Jackson State University, lives two doors down and said he was a longtime neighbor and good friends with Jamison's son.
He ran outside after hearing a loud crashing noise and saw Jamison trying to climb out of her bedroom window. He ran over, grabbed her and pulled her out. He said she was not screaming or crying and seemed to be in shock.
"I pulled her out," he recalled. "She said `Oh my god, somebody's screaming for help. She tried to go back, but I stopped her."
Then the fire got stronger and faster. "This happens on TV, not in Jackson, Mississippi," he said.
Funchess said Jamison's son was at a nearby restaurant when he heard a plane crashed into his house. He was so frantic that he ran home and left his car at the restaurant.
Jamison's husband, Roosevelt, was pacing near the home Wednesday and had some dogs loaded into his truck. He said his wife was doing "OK," but declined to answer other questions, saying he was searching for answers himself. His wife was being treated at the University of Mississippi Medical Center.
National Transportation Safety Board investigators arrived at the scene Wednesday. A preliminary report on the crash is expected in 10 days.
Board investigator Paul Cox said someone in the plane reported engine trouble before the crash, but the nature of the problem wasn't clear.