div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader030vdocumentssitereader030viewer20220204055750686f1a28ab0f07b02430html5page1jpg target=_blank img data-url=ba-gets-under-wayhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: BA gets under way loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader030vdocumentssitereader030viewer20220204055750686f1a28ab0f07b02430html5thumbnails1jpg width=140 height=200 adivp© Nature Publishing Group1984pdiv