Recent attacks against Americans have erupted in Libya and Egypt. The US Ambassador to Libya is killed, along with 3 others, after an anti-Muslim film provoked outrage and sparked mob riots. What will the attacks means for U.S. involvement in Libya and the other countries rocked by the Arab Spring? And how will the presidential race be affected after Mitt Romney criticized the president's response? Also, California shoppers beware, online marketplace Amazon will soon charge sales taxes on purchases. Reporter Jennifer Sharpe profiles amateur astronomers inspired by a 97 year old man. How does peer pressure affect voting? A new study finds just one post on Facebook can dramatically affect voter turnout. And Freddie Mercury, lead singer of the band Queen, is profiled in a new biography that traces his childhood in Zanzibar to his worldwide superstardom.