July 17, 2012 7:12 pm Mass. General Hospital: We're No. 1 Boston teaching hospital pushes aside 21-year champion Johns Hopkins in US News ranking of US hospitals US & World Videos 1:32 Amber Alert for 2 NH girls canceled, father in custody 2:53 Latest on Lewiston, Maine shootings 2:01 Local researchers looking to turn plastic into fuel 1:45 Gov. Healey to sign bottle ban order for state agencies 2:41 Leominster students return to school after floods