HARARE (AFP) - The Zimbabwe opposition's number two was charged with subverting government on Thursday and faces a potential death penalty, as more violence was reported before next week's presidential run-off. Tendai Biti, the opposition Movement for Democratic Change (MDC) secretary general, faces four charges including subverting the government, election rigging and "projecting the president as an evil man." MDC leader Morgan Tsvangirai, who faces President Robert Mugabe in the June 27 run-off election, dismissed the charges as "frivolous." The charges stem from documents prosecutors say Biti authored discussing plans to rig the March 29 first-round parliamentary and presidential vote,...