i think we can look back and be extremely grateful for the contribution she made. churchill: we shall fight with growing confidence and growing strength in the air. we shall defend our island, whatever the cost may be. we shall never surrender. newsreel: way up in the sky, there are messerschmitts, junkers, heinkels or dorniers that are going to get the thrashing of their lives. in july 1940, the fate of the world hung in the balance. britain was facing the threat of invasion from nazi germany. adolf hitler knew that to win the war, he would need to invade britain. that summer, he made the decision