RT News - August 30, 2015 (12:00 MSK)

Two U.S. journalists are killed by a sacked colleague during a live broadcast, sparking fresh calls for tighter gun controls; A grim chapter in Europe's migrant crisis - after more than 70 refugees, including four children, were found dead in an abandoned lorry on an Austrian motorway; Lebanon's leaders are given three days by street protesters to call an election and tackle corruption, amid warnings that the country could be staring at an Arab Spring-style uprising.