The first major crash of the year has proven particularly embarrassing for the agency.
Those two are the only major crashes that the safety board has not solved.
A major crash began in the summer of 1974.
Another major crash, and independence could be off the agenda for a generation.
There had been two major crashes per year since the facility was opened.
The board issued its report without the open hearing that is usual in the case of major crashes.
The ultimate payoff from the car might not come until the first major crash.
As the green came out on lap 49, a major crash occurred in turn 3.
Not a major crash - it means that everything lies in the future for her.
The investigators usually do not finish their work on a major crash before a year is up.