MCLEAN, Va.—As America marks its historic 250th birthday, Tegna has announced that it will culminate its year-long, cross-platform storytelling initiative “America’s 250: Red, White & YOU” with a one hour special on June 29. The special will be hosted by Lesli Foster and Lorenzo Hall from Tegna’s WUSA station in Washington, D.C. It will be broadcast and streamed across all Tegna stations beginning June 29.“Our journalists are uniquely positioned…