Videos: Lester Holt

NBC News Lester Holt investigates a double bind for a growing number of Americans. Some hard-working people are grappling with an economic 'cliff effect' where a pay raise can actually make them worse off while also costing taxpayers at the same time.

Keith Morrison reports on a young woman's disappearance, following her chance encounter with a stranger on a train. Her desperate family hires a dream team of detectives to follow the mysterious trail she left behind.

Watch more of Crystal Harris' efforts to change the law. This web exclusive is part of the Dateline report 'Behind Closed Doors' from Wednesday, May 22nd, at 8pm/7c.

Watch this special sneak peek from Dateline NBC's Andrea Canning into the all-new 'Behind Closed Doors' airing Wednesday, May 22nd, at 8pm/7c.

Listen to more of Crystal's 911 call. This web exclusive is part of the Dateline report 'Behind Closed Doors' from Wednesday, May 22nd, at 8pm/7c.

The heavily reinforced vault that saved 22 lives is all that is left standing of what had been the Tinker Federal Credit Union, one of many places people managed to hide from the deadly tornado. On Wednesday, Moore, Okla., officials discussed the idea of making safe rooms mandatory for new homes. NBC s Lester Holt reports.

As the scope of devastation becomes clear, residents of Moore, Okla., are beginning to sort through the wreckage of their homes for any memories they can salvage. NBC’s Lester Holt reports.

As the scope of devastation becomes clear, residents of Moore, Okla., are beginning to sort through the wreckage of their homes for any memories they can salvage. NBC’s Lester Holt reports.

Thousands have been displaced by the Oklahoma tornado that killed at least 24 people. So far, not everyone has been accounted for and rescuers are still searching. NBC s Lester Holt reports.

Thousands have been displaced by the Oklahoma tornado that killed at least 24 people. So far, not everyone has been accounted for and rescuers are still searching.  NBC’s Lester Holt reports.

The 17-mile-long twister destroyed the landscape of Moore, Okla., in 40 petrifying minutes and killed at least 24 people including nine children. NBC’s Lester Holt reports.

The 17-mile-long twister destroyed the landscape of Moore, Okla., in 40 petrifying minutes and killed at least 24 people including nine children. NBC’s Lester Holt reports.

Thousands have been displaced by the Oklahoma tornado that killed at least 24 people. So far, not everyone has been accounted for and rescuers are still searching.  NBC’s Lester Holt reports.

Officials in Oklahoma report at least 20 children were killed and 70 hurt by the monstrous tornado that ripped through the state on Monday with two elementary schools in its path. NBC’s Lester Holt reports on the violent storm’s youngest victims.

Officials in Oklahoma report at least 20 children were killed and 70 hurt by the monstrous tornado that ripped through the state on Monday with two elementary schools in its path. NBC’s Lester Holt reports on the violent storm’s youngest victims.