Here’s the latest National News from CBS Radio News:

The NTSB releases a preliminary report on the crash that left one dead and several others injured
Twitter said its tools are "apolitical" and that it enforces its rules "without political bias"
In the new memoir, "Educated," Westover details her brutal, isolated upbringing and explores what it means to be a family
Billy Graham transformed religious life through his preaching, becoming a counselor to several U.S. presidents
The group includes mass shooting survivors, gun owners and those who have lost loved ones
School shooting survivors enter gun-friendly political climate, where lawmakers have rebuffed gun restrictions
President Trump used Rogelio Martinez's death in November to renew calls for a wall on the Mexico border
On Monday, the hashtag #KillTheNRA started trending on Twitter, inspired by a vandalized billboard in Kentucky bearing the same message
Members of the conservative media have begun to go after the student activists from Parkland
Alaina Petty, Peter Wang and Martin Duque were in the school's JROTC program, and will receive the Medal of Heroism
When skaters, skiers and snowboarders push themselves to the limit, sometimes things go wrong
At 44 she went from being a virtual unknown to one of the most talked-about artists in the world, after her painting of Michelle Obama was unveiled at the National Portrait Gallery
Olympic moments to remember from Pyeongchang, South Korea
The mesmerizing stage and screen actor has earned his third Academy Award nomination, for "The Florida Project"
Investigators want the public's help identifying women and children in convicted serial killer Rodney Alcala's photographs