In the story mission homecoming the last barrage of missiles had just finished and the character AI stopped talking. Then a second later another missile hit and a blue orb titled "interact" appeared. I held "[b]X[/b]" and zavala appeared. So I guessed zavala was killed by the lone attack and I revived him. I don't know if it was a bug or just meant to happen on its own. Either way zavala dyeing and my reviving him was cool and I wanted to share it. [spoiler]P.S. Zavala you owe me one.[/spoiler]