Zack Yusof recaps some of the top stories of the week:<br /><br />1. Syria ceasefire deteriorating according to U.N. envoy<br />2. Bernie Sanders says American public will not vote for Trump<br />3 Space X targets 2018 for first Mars mission<br />4. Real estate scion jailed for 7 years<br />5. Big Ben's chimes silenced for repairs
