NBC News fired longtime “Today” show host Matt Lauer on Wednesday for “inappropriate sexual behavior,” making him the second morning television show personality to lose his job because of sexual misconduct charges in a week. Lauer’s co-host Savannah Guthrie made the announcement at the top of Wednesday’s “Today” show. Last week, CBS News fired Charlie Rose after complaints from several women who worked for him. Lauer, 59, has hosted “Today” for two decades. When paired with Katie Couric, “Today” was the longtime ratings leader and was highly lucrative for NBC. It now runs second in the ratings to ABC’s “Good Morning America.”