January 31, 2026 • An ICE unit from the US Department of Homeland Security is playing a role providing security at the Winter Games. At past Olympics, their involvement would have been unremarkable.

January 31, 2026 • The two independent journalists face federal charges related to the interruption of a church service in Minnesota earlier this month. Lemon and Fort say they were there to cover a ...

Abstract: This article presents an attitude trajectory planning algorithm for spacecraft with time-varying mass and nonconvex state constraints. As a stepping stone, the problem of constrained ...