New footage of JFK's assassination shows a motorcade racing at high speed to the hospital

Recently surfaced footage of President John F. Kennedy's motorcade speeding down a Dallas freeway toward Parkland Hospital after his fatal injury has been discovered and is set to be auctioned later this month.

Although the discovery may seem shocking decades after the assassination, experts say it is not necessarily surprising.

“These images, these films and photographs are often still out there. They are still being discovered or rediscovered in attics or garages,” Stephen Fagin, curator of the Sixth Floor Museum at Dealey Plaza, told CBS News. The museum is located in the old Texas Book Depository, where Lee Harvey Oswald shot Kennedy on November 22, 1963.