What are the two symbols in this title

What are we looking at, cuz there ain't any two symbols

As the boys sleep, military airplanes battle fiercely above the island. none of the boys sees the explosions and flashes in the clouds because the twins sam and eric, who were supposed to watch the signal fire, have fallen asleep. during the battle, a parachutist drifts down from the sky onto the island, dead.

4actions not really sure but that seems the most logical