With help from the government, three new nuclear reactors have achieved successful testing or "criticality" to satisfy a presidential challenge.

A program initiated by the Trump administration has allowed small companies to rush their testing of several new nuclear reactor designs. Some worry that safety is being…

Trump ordered Energy Secretary Chris Wright to have three advanced small nuclear reactors hit “criticality” by July 4 of this year.

With help from the government, three new nuclear reactors have achieved successful testing or "criticality" to satisfy a presidential challenge.

Three new nuclear reactors have achieved successful testing, to satisfy a presidential challenge.