If the hybrid rocket needs to be shut down in a hurry all you need do is turn off the pump delivering the oxidiser.

ECONOMIST: The land-speed record

HUNTER-GAULT: Pronk, who has been involved in peace talks in Abuja, Nigeria, says the warring parties--two rebel factions and the government of Sudan--so far do not seem to be in a hurry to make peace in a region where some three million people are affected by the conflict, with some two million displaced and living in camps.

NPR: African Union Leaders to Meet in Sudan

First, I am not surprised that the size of the loss has turned out to be 15% greater than UBS first estimated - because selling or hedging big trading positions in a hurry, as UBS had to do on Friday, is always expensive.

BBC: The how but not why of UBS's losing bets