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The emotional bond between handler and dog is a strong one.

Compare this to the American team, older, taller, plucky, yet seemingly more human.

Nastia Lukin and Shawn Johnson both stumbled at critical points, and Alicia Sacramone's angst was genuine as she faltered.

Yet only a few minutes later, most of them were gabbing like typical American teenagers, the pain of defeat temporal. And you know Sacramone won't be haunted by this for too long. She'll rebound back and get up again

The result was the completion of a series of test planes.

Alexander Graham Bell

This 30-lb. craft with a steam engine flew for 1 min. 20 sec. at an altitude of 70 to 100 ft. for a distance of 3,000 ft.

It was the first successful flight of an unmanned heavier-than-air flying machine. Langley's Aerodrome Number 6 had mechanical problems that day, but it flew 4,200 ft. in November of 1896.

In 1898, at President William McKinley's instigation, the U.S. Army awarded Langley $50,000 to develop a plane that would carry a man aloft. In December, 1903, nine days before the Wrights' test at Kitty Hawk, Langley tried out his new gasoline-powered experimental model. A mishap with the catapult caused the airplane to plunge to the bottom of the Potomac, and Langley gave up his experiments after being criticized by the press for the great expense to the taxpayers.

"She knows these communities so she understands the social aspects that are involved. She's keeping in mind that the one who is going to be making these filters is going to be the person who is drinking the water. That's rarely done in engineering design."

But give China's sports leaders their due: They do understand physics. The tinier the body, the better it spins and twists and flies through the air.

that goes for you, too, Russia and Romania.

Wouldn't it be something if the 2012 Games provide the first truly even playing field in women's gymnastics? It's about time. After all, what good is an age minimum if it's not adhered to by everyone?

It's for this reason that the off-season is used to follow a training program to develop endurance, strength, speed, coordination, and agility. In order to be successful

Warm-up 5 to 10 minutes to increase blood flow and lubricate the joints.Flexibility exercises to slowly stretch muscles and tendons that cross and surround the joints.Strength development to increase muscular power and force.Endurance work to increase and maintain a high level of cardiovascular conditioning and interval workouts to increase speed and stamina.A cool-down period of 5 to 10 minutes after the exercise has finished to let the heart rate return to normal and facilitate the return of blood from the extremities.Post-exercise flexibility exercises of 5 to 10 minutes to prevent muscles from shortening.

The Warm-UpAll exercise should be preceded by a short warm-up period of 5 to 10 minutes. The purpose of this is to prepare your body for more strenuous activity to follow. An excellent warm-up is rope skipping with little or no resistance. Once your body starts to lightly perspire, you are probably sufficiently warmed up. Rope jumping will greatly increase the flow of blood to the muscle tissues and lubricate the joints. This allows you to bend, stretch, jump, and run to the maximum of your ability without fear of injury. Exercise without a proper warm-up is very taxing to the muscles, tendons, ligaments, and joints. Failure to warm-up may lead to injury. Flexibility: Stretching Exercises

Prepare to be a WinnerA high level of personal motivation is critical to the success of anything that you do in life. No matter how much or how little basketball talent you have, if you are motivated enough to follow the program set forth here, you will get in shape. Therefore, you will be better able to achieve your goals. All the many hours that you put into your conditioning program will eventually yield results. In the final minutes of a game when your team is desperately looking for someone to score, grab a rebound, or block a shot, it is you who will come through. Why? Because you are in shape and, even in the waning minutes when everyone else is tired, you can still perform at a high competitive level. With the base built from your preseason training program, you are the one who still has the mental toughness, the strength, the power, and the motivation to get the job done. Although you may never have all the tools to be the most talented basketball player, by working hard and following this preseason program, you will become a well conditioned athlete, able to maximize all your basketball talents. In the end this will enable you to come as close as possible to achieving your basketball dreams.

gets so hot that it can boil water into steam

team can then be used to turn a turbine to make electricity.

California's Mojave desert, there are huge rows of solar mirrors arranged in what's called "solar thermal power plants"

this idea to make electricity for more than 350,000 homes

problem with solar energy is that it works only when the sun is shining

cloudy days and at night, the power plants can't create energy.

solar plants, are a "hybrid" technology

daytime they use the sun

night and on cloudy days they burn natural gas to boil the water so they can continue to make electricity.

form of solar power plants to make electricity is called a Central Tower Power Plant, like the one to the right - the Solar Two Project.

Sunlight is reflected off 1,800 mirrors circling the tall tower

mirrors are called heliostats

move and turn to face the sun all day long

light is reflected back to the top of the tower in the center of the circle where a fluid is turned very hot by the sun's rays.

luid can be used to boil water

make steam to turn a turbine and a generator.

We can also change the sunlight directly to electricity using solar cells.

Solar cells are also called photovoltaic cells

PV cells for short

be found on many small appliances

calculators

even on spacecraft

first developed in the 1950s for use on U.S. space satellites

made of silicon, a special type of melted sand.

sunlight strikes the solar cell, electrons (red circles) are knocked loose

move toward the treated front surface (dark blue color)

electron imbalance is created between the front and back

two surfaces are joined by a connector, like a wire, a current of electricity occurs between the negative and positive sides.

individual solar cells are arranged together in a PV module and the modules are grouped together in an array.

arrays are set on special tracking devices to follow sunlight all day long.

electrical energy from solar cells can then be used directly

used in a home for lights and appliances

in a business

Solar energy can be stored in batteries to light a roadside billboard at night

energy can be stored in a battery for an emergency roadside cellular telephone when no telephone wires are around.