a fleet of birds br in the sky br forming an arrow br cutting across the wind br to reach their destination.... br the shape remains the same br the birds keep changing their positions br to avoid exhaustion br what was the instruction? br who was their instructor? br no gathered audience br there was not a sound in this sight br br a fleet of fighter planes br in the sky br forming an arrow br cutting across the wind br it was a demonstration br the shape keeps changing br the planes keep changing positions br it is a planned execution br there was an instruction br there was a team leader br a gathered audience to applause br there was a lot of sound in this sight br br one is quite natural.... br the other is done to show potential.