Complex sentence: ANR also maintains the readiness to conduct a continuum of aerospace control missions, which include daily air sovereignty in peacetime, contingency and/or deterrence in time of tension, and active air defense against manned and unmanned air-breathing atmospheric vehicles in times of crisis.
Split into simpler sentences: ANR also maintains the readiness to conduct a continuum of aerospace control missions. These include daily air sovereignty in peacetime, contingency and/or deterrence in time of tension, and active air defense against manned and unmanned air-breathing atmospheric vehicles in times of crisis.