Active military, naval, or air service
Active military, naval, or air service includes:
(1) Active duty.
(2) Any period of active duty for training during which the individual was disabled from a disease or injury incurred or aggravated in line of duty.
(3) Any period of inactive duty training during which the individual was disabled from an injury incurred or aggravated in line of duty.
(4) Any period of inactive duty training during which the individual was disabled from an acute myocardial infarction, a cardiac arrest, or a cerebrovascular accident which occurred during such period of inactive duty training.