Welcome to today's Space Briefing, a biweekly roundup of the latest national security space news. Top Story Draft Senate bill would assign MDA responsibility for Space Sensor Layer Draft legislation before a key Senate panel would assign the Missile Defense Agency responsibility for developing the Space Sensor Layer, bucking a Defense Department gambit to fold the project into the new Space Development Agency as part of an effort to develop a new multimission satellite constellation. Related: House lawmakers direct...