Not so anymore. Nine months after Donald Trump’s inauguration, pictures of the president and Vice President Pence are missing from thousands of federal courthouses, laboratories, military installations, ports of entry, office suites and hallways, and from U.S. embassies abroad.

On the walls are empty picture hooks left when workers took down official portraits of President Barack Obama and Vice President Joe Biden on Jan. 20. Federal employees and visitors passing through the hallways since then have puzzled over the missing images, wondering why the traditional signal of the formal transition of power has yet to occur.

The changeover appears to be tangled in a bit of red tape and mystery.