Things for the circus haven’t been so great as of late. The Greatest Show on Earth, the Ringling Bros. and Barnum & Bailey Circus, was shut down after 146 years and last year, New York’s Big Apple Circus filed for bankruptcy. But it turns out Big Apple fans are getting an encore thanks in part to some last-minute medical help. Anthony Mason reports. Source

On 60 Minutes’ second broadcast, Nixon said he hoped “to restore respect to the Presidency at all levels” Source

The remnants likely crashed into the Indian Ocean. Source

Steve Kroft examined a vast unregulated shadow market in leveraged bets called “credit default swaps” Source

“It’s a kind of a magazine for television,” Harry Reasoner told viewers as the broadcast made its debut Source

Colleen McKernan was arrested on New Year’s Eve 2014 for fatally shooting her husband Rob. This video includes footage from the surveillance cameras at the Massillon Police Department in Ohio following her arrest. Source

Rome’s official Christmas tree is losing so many needles so fast residents have dubbed it “The Mangy One.” Source

“48 Hours” goes behind the scenes with a defense team and cutting edge forensic animators as they strategize to defend a woman accused of murder. Correspondent Tracy Smith investigates in a special two-hour edition of “48 Hours” airing Saturday, Aug. 4 starting at 9 p.m. ET/PT on CBS. Source

Officials say 12 people died and others were hurt when a bus carrying tourists flipped over in eastern Mexico Tuesday morning. Seven Americans and two Swedish citizens are among those injured. Source

Officials are looking for answers after Monday’s deadly Amtrak train derailment in Washington state. Federal investigators say the train was speeding when it went off the rails. CBS News correspondent Chris Martinez joins CBSN with the latest. Source