2012/08/20 Headlines: Julian Assange Calls on U.S. to End "War on Whistleblowers"; U.S. Drone Strikes Kill 13 in Pakistan; Last U.N. Monitors Withdraw from Syria; Obama, Ryan Trade Barbs on Medicare Plans; Ryan Backed Stimulus Spending in 2002; GOP Senate Candidate Says Women Can Avoid Pregnancy in "Legitimate Rape"; Kansas Prosecutors Drop Planned Parenthood Case; Striking Miners Face Deadline Days After Mass Slaying; Afghan Officer Kills 2 U.S. Soldiers; Gov't Forces Kill Young Protester in Bahrain;$