A string of murders and violent attacks against Asian Americans has jolted the U.S. over the last year. As shocking as these incidents are, they are not novel. Asian Americans and Asian immigrants have long had to contend with physical attacks and discrimination, something evident in the research of Emma Teng, the T.T. and Wei Fong Chao Professor of Asian Civilizations at MIT, and author of the 2013 book "Eurasian: Mixed Identities in the United States, China, and Hong Kong, 1842-1943." A leading scholar of cross-cultural identity, social assimilation, and exclusion, Teng recently spoke with MIT News about the current crisis of violence against Asian Americans.