Megan's husband woke her the morning of November 4th. For the last time.She hears Wally's gasp for air when he grabs her arm. Then he stops breathing. With basic instruction from the 911 operator, Megan wrestles her husband to the floor and begins chest compressions. The ambulance will be there soon. Surely paramedics can accomplish what she cannot."Mommy?" comes a tiny voice from behind her. Her youngest son stands in the bedroom door. Thankfully...