Investigators search for clues after deadly weekend crashes.
A tenth person has died from injuries suffered in that horrific air show crash in Reno, Nevada Friday.
The racing plane that crashed into the crowd had modern recording equipment on board.
Investigators will be looking at the information it contains, as well as new video of the crash.
74-year-old famed stunt pilot Jimmy Leeward was at the controls of the vintage P-51 Mustang and was among the ten people killed.
70 others were injured.
Investigators are looking closely at photos taken just before impact showing parts of the plane's tail section falling off.
The Reno crash was followed by another Saturday in Martinsburg, West Virginia.
A T-28 piloted by John Mangan of North Carolina was performing a stunt in a formation with five other planes when he crashed.
NTSB investigators continue interviewing witnesses and others in both states, but say it'll be months before knowing for certain what happened.