Significant dates in Vladimir Putin’s 24 years in power in Russia:

Dec. 31, 1999 — In a surprise address to the nation, Russian President Boris Yeltsin announces his resignation and makes Putin, the prime minister he appointed four months earlier, the acting president.

May 7, 2000 — After winning election with about 53% of the vote, Putin is inaugurated for his first four-year term.

May 11, 2000 — Tax police raid the offices of NTV, a popular independent broadcaster noted for critical coverage of the Kremlin. It is the first salvo in moves against prominent independent media that have characterized the Putin era.

Aug. 12, 2000 — The submarine Kursk sinks in the Barents Sea with 118 people aboard, setting off the first widespread criticism of Putin, who stayed on vacation early in the crisis and waited five days before accepting Western offers of help.