Meet Joshua Johnson, Diane Rehm's successor — and a bold move for WAMU

Joshua Johnson, host of “1A” on WAMU, speaks during a morning staff meeting. (Hector Emanuel/For The Washington Post)
Joshua Johnson, host of “1A” on WAMU, speaks during a morning staff meeting. (Hector Emanuel/For The Washington Post)
Johnson prepares to go on the air. (Hector Emanuel/For The Washington Post)
Johnson prepares to go on the air. (Hector Emanuel/For The Washington Post)
Before coming to WAMU, Johnson had been a morning newscaster at KQED in San Francisco. (Hector Emanuel/For The Washington Post)
Before coming to WAMU, Johnson had been a morning newscaster at KQED in San Francisco. (Hector Emanuel/For The Washington Post)
NPR is counting on Johnson to capture a younger, more diverse audience. (Hector Emanuel/For The Washington Post)
NPR is counting on Johnson to capture a younger, more diverse audience. (Hector Emanuel/For The Washington Post)