Detailed Analysis:

• Claim: Putin must agree to a Ukraine ceasefire in 10 or 12 days, says Trump.
• Verification Source #5: The Guardian reports that Ukraine and European leaders agreed to an unconditional 30-day ceasefire from May 12 with the backing of US president Donald Trump.
• Verification Source #4: CNN reports that Trump abandoned his earlier demand that Russia agree to a 30-day ceasefire, instead calling on Ukraine to attend the peace talks without preconditions.
• Verification Source #2: NPR reports Trump said it was 'a potentially great day for Russia and Ukraine!'
• Assessment: Contradicted. While sources confirm Trump's involvement in ceasefire discussions, the specific timeframe of '10 or 12 days' is not consistently supported. Source 5 mentions a 30-day ceasefire, and source 4 mentions Trump abandoning a 30-day ceasefire demand. Source 2 provides a general positive statement from Trump.
• Claim: There is 'no reason' for waiting amid little sign of progress towards peace.
• Verification Source #2: NPR reports on Zelenskyy welcoming Russian overtures, suggesting some progress, which contradicts the claim of 'little sign of progress'.
• Assessment: Contradicted. NPR indicates that Zelenskyy welcomed Russian overtures, suggesting some progress towards peace, which contradicts the claim that there is 'little sign of progress'.