Preheat the broiler and position a rack 8 inches from the heat source. In 2 large skillets, cook the bacon over moderate heat, turning once, until browned and crisp, about 6 minutes. Drain the bacon on paper towels, then break it into 1-inch pieces. Brush the bread on both sides with the olive oil and broil until toasted, about 45 seconds per side. Cut each slice in half diagonally.