Get on the Streetfighter motorcycle and get to the V.I.P. terminal near the airport (it is located in the exceedingly north-west and the marker is outside of the airport area). After the long cutscene you have to swim to the land. As long as you stay in the water the black men are shooting at you, so reach terra firma fast, then they cease the fire - just don't take care of the mule. Return to the air base resp. to your barracks. After the cutscene with the explanations for beginners the first mission is completed.
The mission is failed when Jerry Martinez's Streetfighter explodes.