new tonight, what investigators just learned about dale earnhardt jr.'s plane crash, that plane bouncing twice on the runway, bursting into an inferno. the nascar legend and his family miraculously escaping without injury nbc news investigates, veterans who say the va is stiffing them on medical bills >> it's one of those things where you thought that they would be there and they're not >> the stunning new warning, could some veterans be driven into bankruptcy? and three days of peace and music that defined a generation. 50 years since woodstock >> announcer: this is "nbc nightly news" with lester holt. good evening i'm peter alexander in for lester. breaking this evening, thousands of frustrated travelers at airports across the country facing serious disruptions and long lines as the customs computer system has crashed nationwide