According to Glenn Thrush at the Politico:

House Speaker Nancy Pelosi is pushing back on GOP charges that she knew about waterboarding for years and did nothing.

Pelosi says she was briefed by Bush administration officials on the legal justification for using waterboarding — but that they never followed through on promises to inform her when they actually began using “enhanced” interrogation techniques

So she says she got the legal justification, but they never told her they were actually going through with water boarding.

Well that’s a bit inconsistent with this 2007 Washington Post article:

In September 2002, four members of Congress met in secret for a first look at a unique CIA program designed to wring vital information from reticent terrorism suspects in U.S. custody. For more than an hour, the bipartisan group, which included current House Speaker Nancy Pelosi (D-Calif.), was given a virtual tour of the CIA’s overseas detention sites and the harsh techniques interrogators had devised to try to make their prisoners talk.

Among the techniques described, said two officials present, was waterboarding, a practice that years later would be condemned as torture by Democrats and some Republicans on Capitol Hill. But on that day, no objections were raised. Instead, at least two lawmakers in the room asked the CIA to push harder, two U.S. officials said.

“The briefer was specifically asked if the methods were tough enough,” said a U.S. official who witnessed the exchange.

Way back in 2002, when Nancy Pelosi was actually rooting for us to win the war, she was happy for us to be water boarding terrorists. But in 2006, when she wa more interested in winning back Congress for the Democrats than the U.S. actually winning a war, she decided to throw under the bus all the people who kept us safe.