<CORRECTION that should've been BALTIMORE HARBOR not Boston. Bursting in air?.?.?. absolutely... Think of an aerial firework displays. The purpose was to vertically deliver maiming scrapnel, as wall/berms were erected to protect against direct firing weapons, like cannons & rifles.>

Fort McHenry - September 13, 1814; in Baltimore Harbor (see 'B' above)

"We do not inherit the Earth from our ancestors,
we borrow it from our children."