Which is why it shouldn't say "its (Mankind's) flag". The USA (to its credit) dedicated the Apollo mission to Mankind (which Soviet cosmonauts were pleasantly

Which is why it shouldn't say "its (Mankind's) flag". The USA (to its credit) dedicated the Apollo mission to Mankind (which Soviet cosmonauts were pleasantly surprised by) but the flag was planted as a symbol of the USA. (Other considered options, such as the flags of all countries, were rejected.) The flags, if they still exist, are likely to be blank now anyway.