text:  The 988 Suicide and Crisis Lifeline turns two tomorrow, and a poll by the National Alliance on Mental Illness shows most Americans don't know about the number yet. Here's NPR's Ritu Chatterjee. The NAMI poll found that 23% of respondents are very or somewhat familiar with 988, and only 3% said they or a loved one had contacted the number during a mental health, substance abuse, or suicide crisis. Hannah Waslowski is Chief Advocacy Officer at NAMI.