It was another perfect morning in beautiful San Miguel de Allende, Mexico, for the Valsecas. Little did they know it would be the beginning of a horrific seven and a half months of sheer terror and torture for Eduardo Valseca, son of a Mexican newspaper baron, and Jayne, his wife who tried desperately to free him from kidnappers.

Nadia Kajouji was one of many suicidal individuals who explore suicide websites and chat-rooms online. Sometimes, they find support; other times, they encounter people hoping to push them over the edge.

Jim and Kelley Cannon seemed to have a happy marriage. But things aren't always what they seem, and the secrets that began swirling around town were the least of their troubles.

Award-winning filmmakers Brent and Craig Renaud take you through Chicago's toughest streets, where children grow up quickly and often die too soon.

He struck in the dead of night while his female victims slept, baffling investigators in three different states. But when he comes for a teenager in a picturesque town in Massachusetts, she's got a surprise for him: She and her parents put a stop to his killing spree.

See photos of what Massachusetts police found in the possession of convicted killer Adam Leroy Lane after his attack on Chelmsford, Mass. resident Shea McDonough stopped him in his tracks in July 2007.

It would be terror in both the life of Mary Dabbs and that of Terese French that would ultimately bring them together one helping the other in a case that frustrated police for nearly 15 years.

Josh Mankiewicz explores the tragic deaths of three neighbors and the mysterious landlord whom many believe knows more than she's told investigators.

A development to the story we brought you about struggling families in Ohio who have been pushed over the edge by this recession. There's been a response from people wanting to help.(Dateline NBC)

Some Gulf Coast families say they've fallen through the cracks after being hit by Hurricane Katrina. They survived that disaster -- but worry whether they survive this one. NBCs Kate Snow reports.(Dateline NBC)

BP is planning to soon begin a new procedure that it hopes will permanently seal the leaking oil well in the Gulf. The vast slicks of oil haven't been seen for days, but what scientists say may be even worse and what could affect even more people is what's below the surface. Kerry Sanders went underwater to find out: what lies beneath.(Dateline NBC)

Authorities say Monzer Al Kassar is one of the most notorious international outlaws of the past 25 years, accused of crimes that threatened Americans. NBC's Richard Greenberg tracked the alleged terrorist.

When a mother-to-be is found dead, detectives search the cell phone records of her womanizing fianc in hopes of identifying the killer. Hoda Kotb reports.

Kate Snow reports from inside the family circle of missing 7-year-old Kyron Horman to bring viewers the latest developments in the case, and an emotional and candid interview with his biological parents, Kaine and Desiree. In addition, she speaks exclusively to Desiree and her husband, Tony, who brings a detective's take to how this case has unfolded over the last seven weeks.

Ann Curry travels to the very heart of America, where the need is especially urgent and the stories especially poignant. She brings us a very personal look inside the lives of families who've had it all vanish jobs, then homes, then dreams.