NASA employees and allies protested sweeping science cuts they say are gutting the agency from within. As Congress pushes back on NASA leadership, workers warn the damage is already underway — and the future of U.

More than 200 current and former NASA employees have signed an open letter known as the Voyager Declaration pushing back on "harmful" proposed cuts.

NASA scientists say pending cuts to the space agency could compromise mission safety and pave the way for another tragedy like the 1986 Challenger disaster.