First thermonuclear bomb <a href="https://en.wikipedia.org/wiki/Nuclear_weapons_testing" id="mwtw" rel="mw:WikiLink" title="Nuclear weapons testing">test</a>: The <a href="https://en.wikipedia.org/wiki/Soviet_atomic_bomb_project" id="mwuA" rel="mw:WikiLink" title="Soviet atomic bomb project">Soviet atomic bomb project</a> continues with the detonation of "RDS-6s" (<i id="mwuQ"><a class="mw-redirect" href="https://en.wikipedia.org/wiki/Joe_4" id="mwug" rel="mw:WikiLink" title="Joe 4">Joe 4</a></i>) using a "<a href="https://en.wikipedia.org/wiki/Nuclear_weapon_design#Alarm_Clock/Sloika" id="mwuw" rel="mw:WikiLink" title="Nuclear weapon design">layered</a>" scheme.