BLITZER: A bloody weekend in Syria continued into Monday with more than 100 people killed across the country yet again. Lisa Sylvester is monitoring that and some of the other top stories in THE SITUATION ROOM. Lisa, this is happening almost every single day.</s>SYLVESTER: Yes, we certainly continue to get these reports. Opposition activists say 157 people were killed across Syria today including 88 in the capital Damascus. Activists also say they shot down a Syrian attack helicopter in a Damascus suburb supposedly seen in this video, but CNN cannot independently confirm its authenticity. The violence comes after a particularly brutal weekend where hundreds people were killed in the city of Daraya, which rebels say was one of the first cities to revolt against the Assad regime. Police say one teenager is in critical condition and another in custody after a shooting at a high school near Baltimore today. According to CNN affiliate, WJZ, the shooting took place on the first day of classes at Carrie Hall High School. The 15-year-old male student was quickly arrested. President Obama has ordered all American flags in the U.S. and abroad to be flown at half staff on Friday in honor of Astronaut Neil Armstrong, the first man to walk on the moon. Armstrong died Saturday at the age of 82 and on Friday, he will be buried in Cincinnati -- Wolf.</s>BLITZER: Heard some people comparing him to Christopher Columbus when all the history books eventually will be read, fascinating. Neil Armstrong did amazing, amazing work.</s>SYLVESTER: Yes, certainly a sad loss for this country. A lot of people were very sad on Saturday to hear that news, Wolf.</s>BLITZER: Yes. I was very sad. I was surprised. I didn't know how ill he was, heart surgery complications. A very, very sad time for all of us, especially those of us who remember living through that summer of 1969 when he was the first person to walk on the surface of the moon. It was an amazing moment. Something we'll never forget. Lisa, thanks very, very much. A new technology that uses artificial intelligence to predict threats is now being used by security officials in Tampa during this Republican convention. We're about to give you details.
157 Killed Across Syria; School Shooting Critically Wounds Teen; Neil Armstrong To Be Buried Friday