美联社新闻一分钟 AP 威尼斯遭遇史上第二严重水灾（在线收听）

This is AP News Minute.

Public impeachment hearings of President Donald Trump got underway Wednesday in Washington. The first two witnesses are William Taylor, the top US diplomat in Ukraine and State Department official George Kent. Taylor testified that his staff overheard Trump asking about the investigations he wanted Ukraine to pursue. The top Republican on the panel says the discussions were not inappropriate, let alone impeachable.

President Trump says he's been too busy to watch the impeachment hearings, which he dismisses as a "scam." Trump is hosting the leader of Turkey at the White House and says he wants to expand trade between the two countries.

Flooding in Venice, Italy, has hit its second-highest level ever, forcing tourists to wade through historic plazas. Venice's mayor blames climate change and is calling for the quick completion of offshore flood barriers.

Swedish teen climate activist Greta Thunberg hitched a renewable-energy ride back to Europe. She's sailing into the Atlantic on a trip she hopes will get her home for the holidays.