Video: Sesame Street buttons up Katy Perry
The pop singer was called out for wearing too little clothing for a young audience. NBC's Brian Williams reports. (Nightly News)

Video: Small wonder of a singer leaves some in disbelief
When a little girl from the outskirts of Pittsburgh exploded onto the national stage this week, she delivered a performance so breathtaking that it left many wondering whether her singing is the real deal. NBC's Kristen Welker reports. (Nightly News)

Video: Boehner: ‘I’m just a regular guy with a big job’
In an exclusive interview with Rep. John Boehner, his first as the new Speaker of the House, Boehner insists that being second in the line of succession behind the president does not change the fact that he's just a small businessman who's come to Washington to restore America's faith in

Video: Mick Jagger turns 67, Rolling Stones keep rolling
You can't always get what you want--but what if what the Rolling Stones want is retirement? NBC's Brian Williams reports. (Nightly News)

Video: New dino in town
A new relative of the triceratops was discovered by scientists at the University of Utah. NBC's Brian Williams reports. (Nightly News)

Video: Moscow baked by record heat
Extreme heat and smog have blanketed Moscow. NBC's Brian Williams reports. (Nightly News)

Video: Scientists conclude the chicken came first
Scientists in Britain have think they may have an answer to a question that's been around for a long time. NBC's Brian Williams reports. (Nightly News)

Video: High voltage Chevy Volt comes at a high price
GM's electric car comes with a hefty price tag. NBC's Brian Williams reports. (Nightly News)

Video: Kindle outsells hardcovers
Amazon customers are purchasing more Kindle e-books than hardcovers. NBC's Brian Williams reports. (Nightly News)

Video: California endures heat wave
Record-breaking temperatures gripped Southern California on Thursday. NBC's Brian Williams reports. (Nightly News)