1. Obama pushes for world to punish Syria's leader with missiles Obama presses for world to take stand against Syria with missile strikes

2. Obama presses for world to take stand against Syria with missile strikes Obama calls for missile strike saying Assad crossed "world's red line" 3. Obama calls for missile strike saying Assad crossed "world's red line" Obama urges strike against Assad regime, says world credibility is at stake 4. Obama says he didn't draw the red line on Syria, world did Obama urges strike against Assad regime, says world credibility is at stake 5. dan@newsela.com @read_newsela