MINNEAPOLIS — Emilie Valenti arrived outside the Hennepin County Courthouse before dawn in 20-degree weather and chained herself to a barbed-wire fence. The 55-year-old activist had just taken over the spot of another protester, who’d been chained to the fence in downtown Minneapolis throughout Tuesday night. They’re protesting day and night while the trial of former Minneapolis police officer Derek Chauvin takes place a few hundred feet away. “It’s about families supporting families around police violence.”Image: Samir FerdowsiThese protesters have been taking shifts locking themselves to barbed-wire-topped fencing the National Guard placed outside the courthouse where Chauvin is on trial for killing George Floyd last May 25. While the trial is in session, protesters have occupied space outside the courthouse, playing music, chanting, and waving signs.