WASHINGTON (MarketWatch) -- President Bush dusted off his veto pen Wednesday to once again reject legislation that would lift restrictions on federal funding of medical research using embryonic stem cells."If this legislation became law, it would compel American taxpayers -- for the first time in our history -- to support the deliberate destruction of human embryos. The president has made it clear to Congress and the American people that he will not allow the nation to cross this moral line,” the White House said in a statement highlighting the veto and announcing that Bush signed an executive order boosting funding of research into other types of stem cells.