On August 13th, the Falcon 9 test rig (code name Grasshopper) completed adivert test, flying to a 250m altitude with a 100m lateral maneuverbefore returning to the center of the pad. The test demonstrated thevehicle's ability to perform more aggressive steering maneuvers thanhave been attempted in previous flights.Grasshopper is tallerthan a ten story building, which makes the control problem particularlychallenging. Diverts like this are an important part of the trajectoryin order to land the rocket precisely back at the launch site afterreentering from space at hypersonic velocity.