▁a ▁p ony ▁ride ▁in ▁O ster ville , ▁Massachusetts . ▁While ▁the ▁children ▁were ▁r iding , ▁Kennedy ▁felt ▁labor ▁p ains . ▁Wal sh ▁was ▁sum mon ed , ▁and ▁they ▁were ▁taken ▁by ▁hel ic opter ▁to ▁the ▁Ot is ▁Air ▁Force ▁Base . ▁ ▁President ▁Kennedy ▁was ▁at ▁the ▁White ▁House ▁at ▁the ▁time . ▁August ▁ 7 ▁was ▁the ▁ 2 0 th ▁anni versary ▁of ▁the ▁day ▁the ▁Navy ▁had ▁res cu ed ▁him ▁in ▁World ▁War ▁II ▁after ▁he ▁had ▁spent ▁five ▁days ▁mar oon ed ▁on ▁an ▁island ▁in ▁the ▁Pacific . ▁Kennedy ▁had ▁been ▁in ▁command ▁of ▁Motor ▁Tor ped o ▁Bo at ▁P T - 1 0 9 ▁when ▁it ▁was ▁ram med ▁by ▁a ▁Japanese ▁destroy er , ▁killing ▁two ▁of ▁his ▁crew . ▁His ▁hero ics ▁had ▁helped ▁launch ▁his ▁political ▁career . ▁P T - 1 0 9 ▁and ▁August ▁ 7 ▁were ▁never ▁far ▁from ▁his ▁mind ; ▁he ▁kept ▁a ▁scale ▁model ▁of ▁the ▁boat ▁on ▁a ▁sh elf ▁in ▁the ▁O val ▁Office ▁and ▁each ▁day ▁used ▁a ▁metal ▁tie ▁cl asp ▁sh aped ▁like ▁a ▁tor ped o ▁boat , ▁with ▁P T ▁ 1 0 9 ▁stamp ed ▁across ▁its ▁bow . ▁ ▁B irth ▁and ▁treatment ▁While ▁his ▁father ▁was ▁ab o ard ▁Air ▁Force ▁One , ▁Kennedy ▁was ▁delivered ▁by ▁emer gency ▁ca es are an ▁section ▁at ▁ 1 2 : 5 2   p . m . ▁on ▁August ▁ 7