Anxious about their future on a hotter planet, angry at world leaders for failing to arrest the crisis, hundreds of thousands of young people poured into the streets on Friday for a day of global climate protest. Strikes were planned in each of the 50 United States. By late morning, protesters across the Eastern Seaboard were streaming out of schools and office buildings, pooling around steps of local city halls.  In New York City the main demonstration got underway around midday, but