Silver Line concrete problem may not be critical — Preliminary tests on concrete panels show that major re-networking of the Silver Line extension to and beyond Dulles Airport might not be necessary. A whistleblower lawsuit raised concerns about improperly mixed concrete at Silver Line stations set to open in 2020. [WTOP]

Summerbration concert tonight — This week’s concert in Reston Station Plaza features the Jason Masi band. Parking is free from 6:30-9:30 p.m. [Reston Community Center]

Local company cracks cases — Parabon NanoLabs has helped solve five cold cases since early May with a new approach to genetic analysis. [NBC News]

Nearby: Local weekender — Need a roundup of what to do this weekend? From ice cream making to a concert with a mix of jazz and Indian classical music, there’s a lot to do this weekend. [Fairfax County Government]

Photo of Lake Thoreau’s public art display, submitted by Russ Evans