Earning the Infantryman's Badge: KOREA TRAINING CENTER — Spc. Jorge Duarte pulled a pin, drew back and threw a grenade at a foxhole Thursday, then hunkered down behind a berm to a wait for the “pop.” The grenade hit the ground just in the front of the foxhole, then skidded right across. It was a miss. Again, Duarte threw. This time he drilled it, and the grenade sunk into the foxhole. “What I was told is it was all luck,” said the 20-year-old soldier. “It all depends on the hop of the grenade.” Duarte is one of more than 730 soldiers vying for the expert infantrymen’s badge, a coveted patch that shows they have superb infantry skills. To qualify, soldiers have to complete 34 separate skills under the watchful eyes of proxies who grade their performance.