Martyrs’ Day is a Panamanian holiday commemorating the 1964 riots that began after a Panamanian flag was torn in a conflict between Panamanian and Canal Zone students over the right of the Panamanian flag to be flown alongside the US flag. US Army units became involved in suppressing the violence, and 4 soldiers and more than 20 Panamanians were killed. The incident contributed to the US decision to transfer control of the Canal Zone to Panama. When was full control of the canal given to Panama? Discuss