To add to United's problems, Rafael and Anderson also picked up injuries and could face long lay-offs at a crucial stage of the season.

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Much speculation has focused on whether the pilots lost power at a crucial stage in the manoeuvre, but the position of the crowd and the altitude of the manoeuvre will also be key to the inquiry.

BBC: Analysis: Air show safety gap

England's bowlers generally did a fine job in defending the total, although a single Steve Harmison over which Shivnarine Chanderpaul smashed for 26 at a crucial late stage nearly undid so much of the good work.

BBC: England win after farcical finish

That means compared with their U.S. counterparts, European entrepreneurs have to survive on roughly half as much capital, at the most crucial stage of a startup's existence.

WSJ: Shining a Spotlight on Venture Capital

Proper evacuation plans are crucial, since at each stage of a natural disaster there might be subsequent secondary events that necessitate further evacuations.

FORBES: What Can Be Done To Mitigate The Effects Of The Looming Mt. Fuji Eruption?

At this crucial development stage of his career, Murray needs a full-time coach rather than a part-time advisor, however high-profile.

BBC: Murray split with coach Mark Petchey in April

"Greece is definitely coming back on the agenda, as negotiations with its private-sector creditors are in a crucial stage, " said Ian Stannard, a currency strategist at Morgan Stanley in London.

WSJ: Euro Recovers After Ratings Storm