Since Hannah is a Special Agent of the Federal Bureau of Investigations, her actions would be reviewed by the Office of Professional Responsibility (OPR), not the Internal Affairs Department (IAD), which carries out the same function of OPR but it is attached to a law enforcement agency at the municipal level.
When the delegation is moving through the Cuba's Pinar del Rio province, deciduous trees are seen with red and yellow leaves as in autumn. As a tropical country, Cuba has no deciduous trees.
Any congressional delegation traveling in a foreign country would always have an armed detail escorting them and would rarely if ever, travel on a dirt road with limited routes of escape or secondary options. The premise of this trip begins with an unfathomable error in VIPs are secured in a foreign country.