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Video: Movie magic from trees and trash cans

Marko Constanzo has been responsible for creating the click-clack of high heels on tile or the thud-thud of horse's hooves in hundreds of Hollywood movies. NBC's Amy Robach reports.Â (Nightly News)

Video: New police motto: To predict and serve?

Police in Santa Cruz, Calif., are using a computer program that takes up-to-the-minute data to find patterns and predict where and when crimes are likely to happen. NBC's Peter Alexander reports.Â (Nightly News)

Video: 'Extreme of extremes' weather nationwide

This year, the U.S. has seen the worst in weather: from heat to snow flooding to drought with tornadoes and hurricanes in between. NBC's Mark Potter reports.Â (Nightly News)

Video: All-out fight for GOP nomination, White House

With campaign season in full swing, GOP contenders are battling to take on a president who could be politically weakened by the economy. NBC's Mike Viqueira reports.Â (Nightly News)

Video: Flash floods sweep away 4 near Pittsburgh

Back to back storms overwhelmed drain systems and in some areas, the water was more than nine feet deep and powerful. NBC's Michelle Franzen reports.Â (Nightly News)

Video: Norway survivors return to scene of mass killings

Survivors of the massacre of 69 people return to a youth camp to remember the friends and relatives they lost there. NBC's Jay Gray reports.Â (Nightly News)

Video: Iran sentences US hikers to prison

Two American men arrested along the Iran-Iraq border for espionage and entering the country illegally have received an eight-year prison sentence in Iran. NBC's Ali Arouzi reports.Â (Nightly News)

Video: What will a rebel win look like and mean for US?

The U.S. and NATO have been backing the rebels in Libya. NBC's Andrea Mitchell explains what might happen if the rebels manage to seize control.Â (Nightly News)

Video: Economic woes rattle Americansâ€™ everyday life

As fears of a new recession drive the market wild, millions of Americans wonder whether theyâ€™ll be able to pay their bills. NBCâ€™s Chris Jansing reports.Â (Nightly News)

Video: Saving energyâ€¦ and golden eagles

A California man is trying to make sure an important source of alternative energy, windmills, can co-exist with some of this country's most beloved and majestic birds. NBCâ€™s Anne Thompson reports.Â (Nightly News)

Video: After being freed, â€˜West Memphis 3â€™ speak out

Three men convicted of killing three 8-year-old Cub Scouts in 1993 were freed Friday after a judge accepted a plea deal with prosecutors. The men, known as the â€œWest Memphis 3,â€ speak out at a news conference after the judgeâ€™s decision.Â (NBC News)

Video: Oâ€™Donnell: CNN host asked â€˜creepyâ€™ questions

Former U.S. Senate candidate Christine Oâ€™Donnell tells TODAYâ€™s Savannah Guthrie that she walked out of her interview with CNNâ€™s Piers Morgan because of his â€œcreepyâ€ and â€œinappropriateâ€ line of questioning.Â (TODAY)

Video: Little girl rescued by â€˜human chainâ€™

Thanks to the kindness of strangers, three-year-old Maggie Mullin was rescued from the wreckage after the stage collapsed at the Indiana State Fair on Saturday. NBCâ€™s Kevin Tibbles reports.Â (Nightly News)

Video: Obama to Assad: â€˜step asideâ€™

After months of a brutal crackdown, President Obama explicitly called for President Assad to step down, and he described the last several months as "ferocious brutality" against the Syrian people. NBCâ€™s Andrea Mitchell reports.Â (Nightly News)