Rose turret
... that Air Marshal Arthur Harris regarded the Rose turret as being the only improvement made to the defensive armament of the RAF's heavy bombers between 1942 and the end of World War II?
... that Air Marshal <a class="mw-redirect" href="./Sir_Arthur_Harris,_1st_Baronet" id="mwB34" rel="mw:WikiLink" title="Sir Arthur Harris, 1st Baronet">Arthur Harris</a> regarded the <b id="mwB38"><a href="./Rose_turret" id="mwB4A" rel="mw:WikiLink" title="Rose turret">Rose turret</a></b> <i id="mwB4E">(pictured)</i> as being the only improvement made to the defensive armament of the <a href="./Royal_Air_Force" id="mwB4I" rel="mw:WikiLink" title="Royal Air Force">RAF</a>'s <a href="./Heavy_bomber" id="mwB4M" rel="mw:WikiLink" title="Heavy bomber">heavy bombers</a> between 1942 and the end of <a href="./World_War_II" id="mwB4Q" rel="mw:WikiLink" title="World War II">World War II</a>?