Bedbug infestations have been reported in towns and cities in every American state in the last few years, according to experts at the federal government’s second annual bedbug “summit,” held in early February in Washington, D.C. It’s an insectile invasion of American homes and public places that is only expected to grow. Experts say that increased resistance to pesticides means the tiny insects, which feed on warm-blooded animals, are here to stay, especially in densely-populated cities.