The H-1 Upgrade Program came one step closer to its unofficial goal of "darkening the Maryland skies with H-1's" Friday when the fourth of five AH-1Z and UH-1Y prototypes made its first flight here. Flown by major Pat Lindauer and Bell Helicopter test pilot Gregg Shimp, both members of the H-1 Integrated Test Team here, the one-hour flight of the second UH-1Y prototype, known as Yankee 2, confirmed...