Operation Car Wash - Brazil's massive corruption scandal -- called "Operation Car Wash" -- involves billions in bribes and scores of politicians.
Snitches - The California DA under scrutiny for use of jailhouse snitches disputes allegations by his own informant.
Space Archeaology - Locating archaeological sites for excavation can be a time-consuming and sometimes futile endeavor. But archaeologist Sarah Parcak uses a new method that utilizes satellite imagery to find ancient sites.