July 30 (Reuters) - U.S. Steel said on

Wednesday it has appointed three American directors to its

board, more than a month after Nippon Steel ( NISTF ) closed its

$14.9-billion acquisition of the company.

Its board is now comprised of seven directors, four of whom

are U.S. citizens, including three independent U.S. directors.

Nippon had signed a national security agreement with the

Trump administration in a bid to get the go-ahead for its

acquisition of U.S. Steel.

The agreement gave U.S. President Donald Trump a

non-economic golden share and the authority to name a member to

the board.

The appointments include former AT&T CEO John Donovan,

ex-Lockheed Martin chief Robert Stevens and Timothy Keating, who

is currently the top boss at Keating Global.