Harlem Blast; Govs for Common Core; Tesla Troubles in NJ; American Africans

The latest on the massive gas explosions in Harlem, which leveled two buildings and killed seven (as of 8:30am Thursday). Plus: Delaware Governor Jack Markell speaks out in support of the Common Core as the national standards are questioned in New York and other states. Plus: The electric car company Tesla is contesting a new rule in New Jersey that bans car companies from selling cars directly to consumers; author Chimamanda Ngozi Adichie on her novel Americanah, which is a finalist for the National Book Critics Circle Fiction Award; and tech investor Ben Horowitz shares lessons he learned about making tough decisions while running a new business.