Learn about a hero that very few people know about who probably saved the world from Nuclear war in the 60s! Keep practising 'although', 'even though', 'though' and 'even if' and learn some great vocabulary such as 'the Navy', 'aircraft carrier', 'to pursue', 'almost certainly' and 'to break out', plus a use of 'to pick up' related to receiving signals! More info: https://keyteenglish.com/es/although-even-though-even-if/
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