How to be a shill for charity as we wrap up our business stories from the vast Houston rodeo that ends on Sunday.

I'm David Brancaccio, first the business of air travels and a snarl today with the electricity out at London's Heathrow Airport,

which is normally one of the five busiest in the world.

This is affecting air travel worldwide.

The BBC's Will Bain is following this for us. It was some start to a Friday for thousands of

passengers stranded after flights were cancelled or diverted to other British or sometimes European

destinations. Some planes travelling from the United States, Canada, India and the Caribbean were forced

to turn around in mid-air. Over 1,300 flights had been expected to land or depart from Heathrow

on Friday. The airport says it remained shut until midnight. The root cause of the chaos was a fire

and a nearby electrical substation which supplies Heathrow, and it's not yet known what caused that fire.

The government's energy minister, Ed Miliband,

said the incident made Heathrow look vulnerable.

We've got to learn lessons, he said,

about not just Heathrow, but how we protect our major infrastructure.

In London, I'm the BBC's Will Bain for Marketplace.

Thank you. in London and the BBC's Will Bain for Marketplace. A business reporter goes to Rodeo Houston, a colossal three-week event that wraps up this weekend.

Yesterday we heard from school-age Texans going for ribbons and trophies with their beautiful

barrows, charming chickens, and stately steers. Now that the winners and losers are ranked in

numerical order, the show animals are turned into cash as I get tricks of the trade at a junior livestock auction.

Now, howdy y'all? Let's sell us some lambs and goats.

It's the Friday morning junior market auction at Rodeo Houston, where the students put their gorgeous goats and luxurious lambs up for sale to the highest bidder.

On stage, the number two rated lamb, 173 pounds, medium wool.

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